2004 GMC Sierra 3500 Consumer Discussions

Chevy Silverado and GMC Sierra Duramax Diesel Questions

• a/c heater control

  Written by: davetx on Oct 1, 2011 10:49:48 PM

  I am experiencing a problem with the a/c and heater controls on my 2004 GMC Sierra 3500. I have the dual zoned a/c heater control system. The driver's side of the system, when set on cold running the a/c will all of a sudden switch to hot air blowing thru the vents, but only on the driver's side. The passenger's side continues to blow cold air. No matter what I do, ... Read More

Chevy Silverado and GMC Sierra Exhaust System Questions

• What is the best design for my exhaust system?

  Written by: aljamea3 on Jan 5, 2011 1:54:14 AM

  I have a 2004 gmc sierra 3500 with a 6.0 gasoline engine and just got a new long tube headers for it but don’t know how to do the exhaust design and I have a borla muffler so dose any one have any useful ideas I mean should I make it with one in put and two out puts or the opposite or two out and two in and what pipe ... Read More