Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Replace the anit knock sensor on a 2003 chevy silverado, 4x4 5.

Customer Question
how to replace the anit...
how to replace the anit knock sensor on a 2003 chevy silverado, 4x4 5.3
Submitted: 8 years ago.Category: Chevy
Show More
Show Less
Ask Your Own Chevy Question
Answered in 4 minutes by:
9/19/2009
Chevy Mechanic: Ken, ASE Certified Technician replied 8 years ago
Ken
Ken, ASE Certified Technician
Category: Chevy
Satisfied Customers: 754
Experience: GM Certified Technician, 25 Years Automotive Experience
Verified
Hi and tanks for your question! There are two sensors under the intake plentem. I recommend you replace both and the connectors. They get damaged by heat and water. I will send you the repair information on a second post. Ken
Ken
Ken, ASE Certified Technician
Category: Chevy
Satisfied Customers: 754
Experience: GM Certified Technician, 25 Years Automotive Experience
Verified
Ken and 87 other Chevy Specialists are ready to help you
Ask your own question now
Chevy Mechanic: Ken, ASE Certified Technician replied 8 years ago
More coming.
Knock Sensor Replacement

Removal Procedure


    Object Number: 832149  Size: SH

  1. Remove the intake manifold. Gently pry up the rubber covers.
  2. Disconnect the knock sensor electrical connectors.

  3. Object Number: 309864  Size: SH

  4. Remove the knock sensors.

Installation Procedure


    Object Number: 309864  Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  1. Install the knock sensors.
  2. Tighten
    Tighten the sensor to 20 N·m (15 lb ft).


    Object Number: 832149  Size: SH

  3. Connect the knock sensor electrical connectors.
  4. Push down on the rubber covers.
  5. Install the intake manifold.
Ask Your Own Chevy Question
Chevy Mechanic: Ken, ASE Certified Technician replied 8 years ago

Intake Manifold Replacement

Removal Procedure

    Important: The intake manifold, throttle body, fuel rail, and injectors may be removed as an assembly. If not servicing the individual components, remove the manifold as a complete assembly.

  1. Remove the throttle body. Remove the fuel injectors. Object Number: 679510  Size: SH

  2. Disconnect the following electrical connectors:
  3. Manifold absolute pressure (MAP) sensor (1)
    Knock sensor (2)
  4. Remove the knock sensor harness electrical connector from the intake manifold.
  5. Set the electrical harness aside.

  6. Object Number: 382483  Size: SH

  7. If equipped with vacuum assisted brakes, remove the vacuum brake booster hose from the rear of the intake manifold.

  8. Object Number: 647793  Size: SH

  9. Remove the positive crankcase ventilation (PCV) hose with valve.

  10. Object Number: 863068  Size: SH

  11. Remove the MAP sensor (1) from the intake manifold.

  12. Object Number: 832127  Size: SH

  13. Remove the evaporative emission (EVAP) purge solenoid vent tube by performing the following:
  14. 9.1. Remove the EVAP tube end from the solenoid (1).
    9.2. Remove the EVAP tube end from the vapor pipe (2).

    Object Number: 389993  Size: SH

  15. Remove the EVAP purge solenoid bolt (2), solenoid (3), and isolator (1) from the intake manifold.

  16. Object Number: 832132  Size: SH

  17. Loosen the intake manifold bolts.
  18. Remove the intake manifold.

  19. Object Number: 492770  Size: SH

  20. Remove the intake manifold gaskets (1) from the intake manifold.
  21. Discard the old intake manifold gaskets.
  22. If required, clean and inspect the intake manifold.
  23. Installation Procedure

  24. Object Number: 492770  Size: SH

  25. Install NEW intake manifold gaskets (1) to the intake manifold.

  26. Object Number: 832132  Size: SH

  27. Install the intake manifold.
  28. Apply a 5 mm (0.20 in) band of threadlock GM P/N 12345382 (Canadian P/N 10953489), or equivalent to the threads of the intake manifold bolts.

  29. Object Number: 63222  Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  30. Tighten the intake manifold bolts.
    1. Tighten the bolts a first pass in sequence to 5 N·m (44 lb in).
    2. Tighten the bolts a final pass in sequence to 10 N·m (89 lb in).
  31. Tighten


    Object Number: 389993  Size: SH

  32. Install the EVAP purge solenoid (3), isolator (1), and bolt (2) to the intake manifold.
  33. Tighten
    Tighten the bolt to 10 N·m (89 lb in).


    Object Number: 832127  Size: SH

  34. Install the EVAP purge solenoid vent tube to the solenoid (1) and vapor pipe (2).

  35. Object Number: 863068  Size: SH

    Important: Lightly coat the MAP sensor seal with clean engine oil before installing.

  36. Install the MAP sensor (1) to the intake manifold.

  37. Object Number: 647793  Size: SH

  38. Install the PCV hose with valve.

  39. Object Number: 382483  Size: SH

  40. If equipped with vacuum assisted brakes, install the vacuum brake booster hose to the rear of the intake manifold.
  41. Route the electrical harness into position over the engine.

  42. Object Number: 679510  Size: SH

  43. Connect the knock sensor harness electrical connector to the intake manifold.
  44. Connect the following electrical connectors.
  45. MAP sensor (1)
    Knock sensor (2)
  46. Install the fuel injectors. Install the throttle body. © 2009 General Motors Corporation. All rights reserved.
Ask Your Own Chevy Question
Chevy Mechanic: Ken, ASE Certified Technician replied 8 years ago
That should help you, Thank You Ken
Ask Your Own Chevy Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a chevy mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Ken Your Own Question
Ken
Ken
Ken, ASE Certified Technician
Category: Chevy
Satisfied Customers: 754
754 Satisfied Customers
Experience: GM Certified Technician, 25 Years Automotive Experience

Ken is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money.

Todd LRochester NY

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Chevy Technician

15,659 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,621 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,884 satisfied customers

Have owned a repair shop for 25 yrs.

Dave Nova

Dave Nova

Chevrolet Technician

7,092 satisfied customers

ASE Master Certification. GM World Class Certification

John

John

Master A.S.E Automotive technician

4,071 satisfied customers

A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician

Don - Mo Lurch

Don - Mo Lurch

Auto Mech / Electronics

2,948 satisfied customers

Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

Ron Z.

Ron Z.

- Chevy Tech -

2,822 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
Brake light / Service brake came on as I lost my brakes -
Brake light / Service brake came on as I lost my brakes - passenger right front caliper leaking and I lost pedal- so I redid the front brakes and since I was doing 1 caliper I did the other and replac… read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
Will the esc stop the fuel pump from working?knock sensor?
Will the esc stop the fuel pump from working?knock sensor? … read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
Not enough voltage on 3rd brake light. Brake lights and
brake lights and reverse lights on the bed turn on, just not the 3rd brake light … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Brake pedal goes to floor but no braking. Master cylinder is
brake pedal goes to floor but no braking. Master cylinder is full. 2001 gmc Sierra … read more
Randall
Randall
Auto Technician / Consultant
Vocational, Technical or Trade Scho
69 satisfied customers
After having knock sensors replaced heater does not work.
after having knock sensors replaced heater does not work … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
5,494 satisfied customers
I replaced the knock sensor on my 2006 chevy cobalt 2.2
I replaced the knock sensor on my 2006 chevy cobalt 2.2 liter and I still get a po326 trouble code after driving about 20 miles. The engine runs smooth, no miss firing, knocks or anything out of the o… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
Just replace my knock sensor and now the truck won't start.
Just replace my knock sensor and now the truck won't start … read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
I replaced the knock sensors today and all was well and good
I replaced the knock sensors today and all was well and good till I accelerated over 1500 rpm in drive. Now it will accelerate on its own as soon as you put it in gear and tap the accelerator. It will… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
I have an 06 GMC Sierra 5.3L. Just put both knock sensors on
I have an 06 GMC Sierra 5.3L. Just put both knock sensors on it with a new harness and the updated intake gaskets and now the engine started but it never smooths out like it was before the repair and … read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,659 satisfied customers
3 days ago replaced knock sensors and harness and o2 sensors
3 days ago replaced knock sensors and harness and o2 sensors knock sensor codes still there. now at about 2500 rpm cel flashes and po 300 is stored long term fuel trim goes to +55 percent on bank 2 an… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
5,323 satisfied customers
The old code 43 will not clear, replaced the knock sensor
the old code 43 will not clear, replaced the knock sensor reset the computer 1993 5.7. … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
OBD code P0330 Knock Sensor Bank 2. I've been googleing for
OBD code P0330 Knock Sensor Bank 2. I've been googleing for over a half hour trying to find the location. Can you help. 2012 Traverse 3.6L. … read more
Jaybird61
Jaybird61
Master Automotive Mechanic
2,281 satisfied customers
I installed new knock sensors buy the code is there.
i installed new knock sensors buy the code is there … read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
362 satisfied customers
We paid over $1,000 to replace (3) knock sensors on our 2014
We paid over $1,000 to replace (3) knock sensors on our 2014 2500HD Duramax Diesel truck and still have the same problem with the Stabilitrak and DEF error messages. We have currently 91 miles left to… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
Chevy 2001 Silverado 4.3 L. I replaced the knock sensor and
Chevy 2001 Silverado 4.3 L. I replaced the knock sensor and the "secondary air" and "evap" codes went away. Now getting "heater 02" and "catalytic converter" codes after driving 100 miles. Is there an… read more
roy
roy
Associate Degree
3 satisfied customers
Locked out, having problems with the knock sensors had to
having problems with the knock sensors had to erase codes to get home , now im locked out of the computer … read more
eric remington
eric remington
FORMER SHOP OWNER/TECHNICIAN/INSPECTOR
associates degree
726 satisfied customers
I have a 2008 Chevy Cheyenne 5.3 L with a knock sensor code
I have a 2008 Chevy Cheyenne 5.3 L with a knock sensor code the intake is removed and the conventional picture does not match what I have truck is made in Mexico California emission standards… read more
Don - Mo Lurch
Don - Mo Lurch
Auto Mech / Electronics
Vocational, Technical or Trade Scho
2,948 satisfied customers
The engine knock sensor in front of engine. is there suppose
the engine knock sensor in front of engine. is there suppose to be a wire to connect it? I replaced the sensor and the engine light is still on. its a 2005 impala … read more
Gunvir Singh
Gunvir Singh
1,949 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x