1999 GMC Sierra 2500 Consumer Discussions

Chevy Silverado and GMC Sierra Transmission Problems

1999 gmc sierra 2500 no reverse when trans is hot

Written by: GMCATW on Jan 10, 2009 06:48 PM

1999 GMC Sierra 2500 4x4 Hi.. Does any body have any idea about my transmission. I do snow plowing and after couple of hours of driving back and forth, my truck wont go in reverse for some reason so i have to park the truck for 15 minutes to cool down it works fine after that, any ideas guys. Thanks Read More...

Chevy Silverado: Problems & Solutions

Used 2003 Silverado 2500HD LS: Warranty

Written by: cathmac on Sep 27, 2005 11:00 AM

I have a follow up to my previous posting, # 688, as noted at the end of that posting, but not in the Title, I am looking for advice on what to do for an extended Warranty. One option I didn't outline, but am considering, is to get a shorter term such as 3 years / 36K miles just to get me through the first couple of years but with the option of doing a private party sale and transferring ... Read More...

GMC Sierra: Problems & Solutions

4.3 V6 Rattle Noise

Written by: 99gmlemon on Feb 16, 2001 02:48 PM

I have a 1999 gmc sierra regular cab stepside with a 4.3 V6 with 20,000 miles. Engine makes a rattle noise between 1500-2500 rpm ONLY when the engine is warm. Sounds like a metallic growl when I accelerate. Wait it gets better...if you let go of the gas pedal at a high speed the valves start clicking and knocking as you begin to decelarate. Be warned GM has a service ... Read More...

Sierra auto trans COLD shift problem.

Written by: pclar08 on Nov 28, 2000 10:54 PM

Vehicle: 1999 GMC Sierra 1500, 4wd, ext cab, 5.3 l, 4.10 diffs(rear locking). Description: When transmission is cold (below 25 degrees)the 2-3 upshift does not occur until 32-33 mph. As the transmission warms, shifting becomes normal. Under light acceleration, approximate normal shift is: 1st-2nd: 10 mph; 2nd-3rd: 20 mph; OD: 35 mph. 33 mph in 2nd gear is ... Read More...