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I have a persistent P0740 light on my 1998 GMC Suburban
I have a persistent P0740 light on my 1998 GMC Suburban C1500 with the 4L60E transmission. I replaced the TCC selenoid and while I had the transmission open, I checked the connector with a DVOM and go… read more
Chris (aka-Moose)
Chris (aka-Moose)
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Vocational, Technical or Trade School
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2002 chevy express van 5.7 liter code P0758 2-3 shift
2002 chevy express van 5.7 liter code P0758 2-3 shift solenoid "B" Circuit fault any ideas will be great if you seen the problem and if it is the solenoid easy to get to. Thank you very much 350k on v… read more
Eric
Eric
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N/A
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Have 1997 gmc box truck with 5.7 motor throwing codes po1870
have 1997 gmc box truck with 5.7 motor throwing codes po1870 ,po 751,po102. the po1870 is this a valve body problem or can it be the ignition switch causing this code, read uo on po751 said to check s… read more
Jerry
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I am getting P0740, P0785 And P0001 after initially changing
I am getting P0740, P0785 And P0001 after initially changing out the inocente sensors due to getting coses for both of them. I also changed out both shift solenoids due to the transmission not shiftin… read more
Gary
Gary
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03 gmc sierra 1500 5.3l code p0740, 0753, 0758,0785, & p1860.all
03 gmc sierra 1500 5.3l code p0740, 0753, 0758,0785, & p1860. all tranny codes. Replaced ignition switch. Tested shift solenoids and tcc with were good too. Please point me in right direction… read more
Gm Tech (Cam)
Gm Tech (Cam)
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Vocational, Technical or Trade Scho
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GMC K2500 Sierra 4x4: Got a P0894 code on a 2004 GMC 2500 6.0L
Got a P0894 code on a 2004 GMC 2500 6.0L Crew Cab 4 x 4. Harsh shifts from 1 to 2 and 2 to 4 once trans temp gets over about 110 degrees F on the gage. Issue started after having to "rock" the vehicle… read more
Gary
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GMC Seirra: 1998 GMC 1500 SLT 4X4 with 4L60E automatic transmission.
1998 GMC 1500 SLT 4X4 with 4L60E automatic transmission. Torque converter locking and unlocking. It does un lock when brake applied but starts unlocking and locking as soon as brake released. All sole… read more
Gary
Gary
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GMC Yukon Denali: 01 gmc yukon 6.0L 4x4 truck wont come
'01 gmc yukon 6.0L 4x4 truck won't come out first gear not even manual shifting scanner shows no codes and pcm is commanding shifts 1-2 2-3 and 3-4 I removed valve body and cleaned up checked all valv… read more
Pete
Pete
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General auto certifications
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Gmc Jimmy: 2000 gmc jimmy code p0740.trans shifts into all
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Gary
Gary
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GMC 1500 Series: I have a 2005 GMC Sierra 1500. I have an engine
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Roy
Roy
shop foreman
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GM sonoma: 2000 gmc Sonoma 4.3l 2wd in limp mode, gear indicator
2000 gmc Sonoma 4.3l 2wd in limp mode, gear indicator locked In 3rd gear. p0740, p0758, p01860. shift seliniods where throwing codes, replaced ignition switch and dropped the pan tested shift selinoid… read more
Chris (aka-Moose)
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GMC Envoy: I have a 2003 GMC Envoy with 180,000 miles. The
I have a 2003 GMC Envoy with 180,000 miles. The transmission was recently replaced for $3,000, with a three year warranty. Shortly after replacement, the new transmission failed, and was replaced. Now… read more
Eric
Eric
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N/A
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GMC C3500 HD: 2000 GMC 3500 6.5 diesel no upshift into overdrive
2000 GMC 3500 6.5 diesel no upshift into overdrive after automatic downshift. If you shift the transmission manually into third then back into 4th it will go into 4th. If you turn off the engine and s… read more
Gary
Gary
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GMC Syclone: I have a 1991 GMC Syclone with a EGR system that
I have a 1991 GMC Syclone with a EGR system that does not work. I have all the OEM GMC service manuals and supplements. I have found the EGR control solenoid to be bad and have replaced it with a OEM … read more
Wolfgang
Wolfgang
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GMC: i have a 98 Gmc 1500. it runs fine in all the gears, but
i have a 98 Gmc 1500. it runs fine in all the gears, but when it is cold out putting it in reverse will stall the truck… read more
Gary
Gary
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GMC Yukon XL Denali: I own a GMC Yukon XL Denali package. The
I own a GMC Yukon XL Denali package. The other day the check engine light came on. I took it to the dealership and they scaned the code. It was P2761 Torque converter solenoid open fault. The Tech at … read more
Pete
Pete
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GMC 1500 Series: I have a 2000 GMC 1500 with 5.3 v8 I just
I have a 2000 GMC 1500 with 5.3 v8 I just replaced the rear main seal and now the transmission is real sluggish and my obd2 is showing error code 0785 shift timing sol… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
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GM 1997: 1997 gmc sonoma 4.3 AT engine code X. trans fuse
1997 gmc sonoma 4.3 AT engine code X. trans fuse kept blowing in cab. trans in limp in mode. codes740 tcc solinoid circuit, p0753 1-2 shift soleniod a circuit p0758 2-3 shift soleniod b circuit po785 … read more
JHoop
JHoop
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High School or GED
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Gm Tech (Cam)

Gm Tech (Cam)

GMC Mechanic

1,823 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

1,589 satisfied customers

GCM master tech over 25 years

Dave Nova

Dave Nova

GMC Technician

929 satisfied customers

ASE Master Certification. GM World Class Certification

Chris (aka-Moose)

Chris (aka-Moose)

GMC Technician

675 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- GMC Tech -

285 satisfied customers

18+yrs experience. State Inspector & GMC Diagnostics/Repair

JFN1

JFN1

ASE Certified Technician

272 satisfied customers

GM Master Technician

George H.

George H.

ASE MasterTechnician

230 satisfied customers

15+ Years ASE Master Technician with Level 1 Certification

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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.

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