Last post on Dec 07, 2013 at 6:17 PM
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Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Transmission, Truck
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#701 of 1523 2010 1500 slt Z71 4x4 5.3 engine
Oct 31, 2010 (10:30 pm)
I have a 2010 GMC Sierra Crew Cab 1500 pickup with a 6 speed transmission. The transmission has selections for Park, Reverse, Neutral, Drive and (M) M allows you to select from all 6 speeds. 6, 5, 4, 3, 2, & 1. You can use Drive only or move the gearshift into (M) that should first go to 6th gear at top so the transmission does not tear itself apart by dropping down into a much lower gear such as Low (1). Well my problem is when I select (M) it first shifts down into Low (1) which could destroy the tranny and who knows what else. Has anyone who owns the 2010 (or other years) GMC Sierra 1500 pickup had this happen?
Help me please. CAH
#702 of 1523 2008 Sierra Transmission Free Wheeling
Nov 01, 2010 (6:28 am)
I have a 2008 Sierra 4x4 with automatic transmission. On drive home the transmission would go into a free wheel type of activity. When I would hit a certain speed, the RPM's would keep going but the transmission would not keep up. Almost acting like truck is in neutral.
But when back to around 20 MPH it would catch again. Did it in Drive and 3rd, eventually got down to 2nd gear and was able to limp home.
Any ideas on why the transmission would not keep up with speed and disengage? Is whole transmission shot?
#703 of 1523 Re: 2000 Chevy Z71 possible torque converter bad?? [jlandon]
Nov 01, 2010 (7:52 am)
Check your "Heat Temp Sensor", this will cause the hesitation going into gear ! I know it sounds crazy, but the "Heat Temp Sensor" tells the computer the engine is still cold and it keeps dumping more fuel , causes hesitation on take off! Just something to check !!!
#704 of 1523 Re: 2008 Sierra Transmission Free Wheeling [sweed1]
Nov 01, 2010 (7:53 am)
I would definitely recommend taking your vehicle in to be diagnosed. Please keep me updated on your progress.
GM Customer Service
#705 of 1523 Please Help! Need an Expert!
Nov 02, 2010 (12:47 pm)
89 GMC Sierra K2500-
I was accelerating from a stop sign and suddenly lost drive in all ranges plus no 4wd. When I inspected underneath the truck I noticed that wire harness that holds the switches for the transmisson and and transfer case had somehow come loose and all of the wires got riped by the one of the drivelines. I also had a blown fuse on the 4wd fuse. Long story short, I fixed the wiring, replaced blown fuse and ended up replacing torque converter and put the transmission back in the truck. Now when I start it up (with the rear axle jacked up) the rear axle does not spin unless I rev it up. Now the weird thing is that it spins the same way in drive than it does in reverse. Do I have some wires crossed here or what? Im stumped! Any insight to this matter would be greatly appreciated. Thanks,
#707 of 1523 Re: 2000 Chevy Z71 possible torque converter bad?? [1998lincoln]
Nov 04, 2010 (4:10 pm)
I have a 2003 1/2 ton extended cab that sometimes feels like it is slipping out of gear (only for about a 1/2 second at a time) The odd thing is that I noticed that when it happened, the temp gauge would drop to the coolest !!!
I could not think why the two things would be related, but maybe that is the problem.
Will it get worse if not addressed, and about how much would the dealer charge to fix/replace the "Heat Temp Sensor"??
#708 of 1523 Re: 2010 1500 slt Z71 4x4 5.3 engine [2010pickup53]
Nov 05, 2010 (3:42 pm)
I actually have my 2010 GMC Sierra at the dealership now, although we have different issues with the truck it is also with the transmission and the dealer's mechanic drove it and noticed the problem. They are saying that we have a lazy transmission, the mechanic said that it has a learning transmission, but they are baffled why it does not know why it does not know when to shift.... I kind of feel in the same boat that we bought a 44,000 dollar truck and don't know what the problem is or how they can fix it. We had a 2005 Chevy Hybrid before this and had no problems until the 5 years were up. Then the big problems set in. Since it was electronic in certain areas such as steering we lost sterring going down the road and the truck was running, but we also had shifting issues with that truck as well, this is a first year for this transmission so if you find out anything before we do PLEASE let us know what your issue is, we already asked the dealer to see what the trade in value for this truck will be so that we are not getting another lemon. Good luck with your issue glad to see that we are not the only ones that are dreaming that this is happening,
#709 of 1523 Re: 2010 1500 slt Z71 4x4 5.3 engine [jmennace]
Nov 15, 2010 (6:37 am)
Was the dealer about to fix your concerns? Please e-mail me and keep me updated on your situation. Thank you!
GM Customer Service
Nov 15, 2010 (2:43 pm)
last year my truck would not accelerate over 45mph, rpm's kept rising but mph would not ,two months ago did it again exact same problem...only did it for a minute or two each time, other than those two times truck has not acted up...........any ideas on what could cause this problem