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I have a 2000 gmc savana 2500 with the 4L80E transmission,
I have a 2000 gmc savana 2500 with the 4L80E transmission, my overdrive is not working l have a p1860 (tcc electrical circuit) transmission code, l change all the solenoids along with harness that was… read more
RiopH
RiopH
Diagnostic Technician and programmer
348 satisfied customers
1999 chevy Silverado 1500 5.3 - have transmission codes
1999 chevy Silverado 1500 5.3 - have transmission codes p0740 p1860 p0785 p0758 p0753 ,transmission stuck in 3rd ,instrument cluster inoperative . looked on all data no tsb for ignition switch issue i… read more
J Hall
J Hall
retired
none
1,450 satisfied customers
Got a GMC 1500 Sierra 2000 5.7 and 4l60e trans. The truck
got a GMC 1500 Sierra 2000 5.7 and 4l60e trans. The truck only has 67000 original mile's. Tranny started acting like it was slipping and not shifting. No code. Went in and changed out all solenoids an… read more
Tim\u0027s Auto Repair
Tim\u0027s Auto Repair
Mechanic
High School or GED
15,815 satisfied customers
03 gmc envoy. Transmission. Have to let up on acceleration
03 gmc envoy. Transmission. Have to let up on acceleration to shift to 2nd. No overdrive and now no reverse. Reverse is like being in neutral. Changed filter and fluids. Unhooked battery and left off.… read more
Greg
Greg
Shop owner, technician
Vocational, Technical or Trade Scho
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How does it take to swap a transmission in a 2004 gmc savana
How long does it take to swap a transmission in a 2004 gmc savana 2500 cargo van … read more
Kurt Mulling
Kurt Mulling
Lead Technician/ now retired
High School or GED
1,641 satisfied customers
I have a gmc savana 2000. Vin # *****************. What
I have a gmc savana 2000. Vin # *****************. What other transmissions ar … read more
Tim\u0027s Auto Repair
Tim\u0027s Auto Repair
Mechanic
High School or GED
15,815 satisfied customers
2000 gmc 2500 savana van just shut down today thought it was
2000 gmc 2500 savana van just shut down today thought it was fuel pump changed it out but still engine sputers but wont start … read more
kyle swart
kyle swart
Certificate Of Completion, Automotive Technology
1,207 satisfied customers
2000 gmc 4l60e transmission. p1860 code just replaced entire
2000 gmc 4l60e transmission. p1860 code just replaced entire valve body and all solenoids. what else could cause this … read more
Eric
Eric
Retired
N/A
46,036 satisfied customers
I've got a 1994 K1500, 5.7, 4l60e. the transmission was
I've got a 1994 K1500, 5.7, 4l60e. the transmission was rebuilt has power (12v). Poor take-off ( Feels like 2nd gear), wants to shift to 4th, overdrive at 20 mph, no power to the ground in D or OD. He… read more
Gary
Gary
Gold Certified GM Technician
Vocational, Technical or Trade School
2,997 satisfied customers
I just picked up an 03 GMC Sierra 1500. The transmission
I just picked up an 03 GMC Sierra 1500. The transmission defaults it's self to limp mode. 3rd gear only. It display's codes p0443 p0740 p0753 p0785 p0758 p1860. The transmission is a newer creat trans… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
36,559 satisfied customers
4l80e in my 2001 Yukon 2500 with 6.0L engine. shifts hard
4l80e in my 2001 Yukon 2500 with 6.0L engine. shifts hard all the time even at startup in the cold mornings no codes ever. Also in the morning when I start it the engine clatters pretty loud oil press… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
2,126 satisfied customers
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)
GMC Mechanic
Vocational, Technical or Trade Scho
2,126 satisfied customers
GMC Sierra 2500 HD SLT: 2000 gmc Sierra 2500. 6.0 v8. 4l80e
2000 gmc Sierra 2500. 6.0 v8. 4l80e auto trans. Shifts late and jerks. DTC P0751 Shift solenoid a performance or stuck off. Replaced solenoids still faulty. What else do I need to check?… read more
JFN1
JFN1
ASE Certified Technician
Vocational, Technical or Trade Scho
272 satisfied customers
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
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
GMC Sierra K3500 SLT: I have a 1996 GMC K3500 SLT regular cab
I have a 1996 GMC K3500 SLT regular cab with a 5.7 Ltr engine. What transmission is in this vehicle and are there adjustments for the automatic transmission? My transmission downshifts to lower gears … read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
GMC C2500 Sierra 4x2: Transmission issue: I have a 2000 gmc
Transmission issue: I have a 2000 gmc sierra 2500, 2wd, 6.0L, automatic (4L80E). Bought it new, serviced transmission every 30,000 and have done minimal pulling. The tranmission functions perfectly 'e… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
GMC C1500 Sierra 4x2: I have a 1994 C1500 5.7 with automatic
I have a 1994 C1500 5.7 with automatic trans. It will not shift from 1st to 2nd unless I wind up 1st and then release gas pedal quickly. It then shifts all the way to overdrive, no 2nd or 3rd. It spen… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
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
929 satisfied customers
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Meet the Experts:

Gm Tech (Cam)

Gm Tech (Cam)

GMC Mechanic

2,126 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

904 satisfied customers

24 years of experience diagnosing & repairing

JFN1

JFN1

ASE Certified Technician

272 satisfied customers

GM Master Technician

Mike S.

Mike S.

ASE Certified Technician

9,319 satisfied customers

GMC N.A.I.S.E. Certified Auto-Mechanic

George H.

George H.

ASE MasterTechnician

233 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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