If the door is sagging then you could look at the door pins and bushings. If the bushing is cracked then it will sag and therefore not close properly. If that is the case then the pins and bushings should cost under $10 and take about a half hour to do. Hope this helps.
adjust the idle screw on the drivers side of the throttle body turn it to the right to lower you idle turn to the left to raise it
This is computer controlled
you dont adjust you replace brake shoes
you have to replace it
Check your shocks
To adjust the parking brake on a 2002 GMC Sierra you need to locate the steel threaded cables that comes out of each wheel well. Use the adjuster nut to either tighten or loosen the cables.
6.5 feet
4x6
The spare tire lowering handle is probably located under the rear seat on the 1999 GMC Sierra, if the vehicle is an extended cab. If it is not the extended cab, look behind the driver's seat for the handle.
yes it can be done , i just did it on my 1995 gmc sierra extended cab , e-mail me for more info ... wawzzy@hotmail.com
Pay someone else to do it!
http://www.youtube.com/watch?v=RfnrSMe570o