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I have a 2011 gmc 2500hd with 6.6 duramax im having problem
I have a 2011 gmc 2500hd with 6.6 duramax im having problem with my truck dieing when I hit a bump and check engine light flashing on then immediately back off code p2510 is showing when this occurred… read more
David Craig
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Associates
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I have an 02 GMC Sierra. I have put an 04 5.3l in it. I used
I have an 02 GMC Sierra. I have put an 04 5.3l in it. I used the same 4l60e transmission during the engine swap. All is fairly good with it except it just feels like a dog when initially takes off. I … read more
tim37857
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Gm Tech (Cam)
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Vocational, Technical or Trade Scho
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I have a 2001 GMC Sierra and it seems when I drive the first
I have a 2001 GMC Sierra and it seems when I drive the first two gears shift rather hard like it's delayed and when I get on the highway it's like delayed time in acceleration. My drive shaft can move… read more
Gary
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ASE Certified Technician
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I have a 2006 GMC Sierra 2500HD Duramax 4x4. I changed all
I have a 2006 GMC Sierra 2500HD Duramax 4x4. I changed all my glow plugs about 500 miles ago. I just tried starting it and it won't start. The glow plug light stays on for awhile then goes off, but wo… read more
supermechanic
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We have a 2008 GMC Sierra 1500 and have replaced the
We have a 2008 GMC Sierra 1500 and have replaced the transmission 2 times, and the 3rd has just seemed to go out. All in the last 18 months. And within 20,000 miles. It doesn't shift hard, just gets t… read more
Dan
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I have a 2005 GMC Sierra 1500 z71. When I put my truck in
I have a 2005 GMC Sierra 1500 z71. When I put my truck in 2WD(push button) it will run about 100yds then pop out of gear...I can run in auto(push button) no problem except when it seems to want to go … read more
Gm Tech (Cam)
Gm Tech (Cam)
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Vocational, Technical or Trade Scho
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GMC Envoy: my 2004 GMC Envoy will shift in 1st, 2end, and 3erd
my 2004 GMC Envoy will shift in 1st, 2end, and 3erd but won't shift into 4th gear. I have put in a new filter in and changed the trans. fluid but still have the same problem. what can I do?… read more
Gary
Gary
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GMC Sierra 1500: Hi Billy, I have a 2007 GMC Sierra. It became
Hi Billy, I have a 2007 GMC Sierra. It became stuck in 4WD low range last week. Upon speaking with a local mechanic, he informed me i needed an encoder ring. He ordered the part, and after i removed t… read more
Gary
Gary
ASE Certified Technician
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GMC Sierra 1500 HD Classic SLT: I have a 2001 sierra 1500 GMC
I have a 2001 sierra 1500 GMC pick-up. Granted, I have 442,000 miles on the truck.All freeway miles,and serviced every other month at the dealership. Today I was driving home and the truck shifted as … read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
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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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Vocational, Technical or Trade Scho
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GMC Sierra 1500 SLT: 2007 sierra5.3 L with 4 spd auto4x4wont
2007 sierra 5.3 L with 4 spd auto 4x4 wont shift by itself, have to manually up shift ... and when coming to astop in drive...have to then put it back to 1/L if i try to take off in D, it sounds like … read more
Gm Tech (Cam)
Gm Tech (Cam)
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Vocational, Technical or Trade Scho
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GMC Envoy SLT: I have a 2005 GMC Envoy with a straight 6 cyl.
I have a 2005 GMC Envoy with a straight 6 cyl. After 20 or 30 minutes of driving, if I am driving 45 or 65 so the rpm's are around 1800, if I give it slight gas, the engine starts to cut and speed up … read more
Gm Tech (Cam)
Gm Tech (Cam)
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GMC Sierra C3 Pickup: I have a 2001 GMC Sierra C3, 103k miles,
I have a 2001 GMC Sierra C3, 103k miles, check engine light came on, then transmission would not shift to overdrive or shift down to 2nd,(2nd has always been sluggish to start from) or 1st. Had tranny… read more
Dave Nova
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GMC: I HAVE A 1995 GMC PU WITH A 4L60 OD TRANS , IT QUIT SHIFTING
I HAVE A 1995 GMC PU WITH A 4L60 OD TRANS , IT QUIT SHIFTING IN 2ND AND OD , IT STILL SHIFTS AND PULLS FINE IN 1ST AND 3RD , I UNDERSTAND THE SHIFTING IS ELECTRIC IS THEIR ANYTHING I CAN DO ?… read more
Gary
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GMC Sierra 1500 Classic SLE: I have a 2005 GMC Sierra 1500
I have a 2005 GMC Sierra 1500 Z71 pick up. The Service 4WD light came on months ago and I have not been able to switch into 4X4. Currently it is stuck in 2WD. I replaced the switch on the Dash and tha… read more
Gm Tech (Cam)
Gm Tech (Cam)
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Vocational, Technical or Trade Scho
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GMC Sierra 2500 HD: i was told that the synchronizer in my
i was told that the synchronizer in my manual transmission was bad because when i change gears, it grinds a little bit. i have a 2003 gmc 2500hd 6.0 v8. can you tell me what the problem might be?… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,588 satisfied customers
GMC Sierra 2500 HD SLT: I have an 03 Sierra 2500 Duramax.
I have an 03 Sierra 2500 Duramax. A couple of months ago, my Allison trans began shifting erratically, and not going into high gear, my PRNDL display was erratic (sometimes no position showed, sometim… read more
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Meet the Experts:

Gm Tech (Cam)

Gm Tech (Cam)

GMC Mechanic

1,796 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

1,588 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

626 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- GMC Tech -

279 satisfied customers

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

JFN1

JFN1

ASE Certified Technician

270 satisfied customers

GM Master Technician

George H.

George H.

ASE MasterTechnician

228 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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