Hi guys just purchased a 1998 GMC JIMMY 115000kms on the clock, and
everytime I switch on the windshield defroster there is no heat coming
through because the A/c compressor turns on. Then when I turn the knob to
dash vents compressor shuts down and normal heat blows out. The A/C ...

I drive a 1993 silverado sportside
the truck came with a cap on it giving me roughly 600 km per tank of
fuel.  I took the cap off and now I am getting roughly 500km per tank
of fuel.  

My truck is a 99 silverado with the 4.3L V6 64,500mi
About a week ago the Service Engine Soon light came on in the truck. I took
it down to auto zone where they hooked up the scanner and it revealed 2
codes, 450 and 451. They asked if I ever fueled the truck up with it

Regarding 2004 Silverado warning chime:
I have heard the warning chime if I open the door with the key in the
ignition. This came as no surprise.
The same thing happened when I tried to drive off with the parking brake

i have a new silverado with a 1000lb trailer + 2 snowmobiles to pull this year
and i noticed that the tow mode revs somewhat higher..should i use this for
towing all the time?is this hard on the truck?i plan on keeping this truck for
10 years and it will be used mostly for towing ...

I can't find the PROM image for my 86 S10 *anywhere*.  Looked at at
dyi-efi and other places but no luck.  Anybody know where I can find
it?
The PROM part number is 16060295, broadcast code FKS 3339.  The ecm pn

I like to listen to my stereo system in my truck when the engine is off and
the doors are open. Can someone tell me how to disable the "ding, ding,
ding" sound when the keys are in the ignition and the doors are open?
Gig

I have a 99 Sonoma, 2.2 L.  with 80K miles.  For the past 40K miles
I've been observing the water pump (every time I changed the oil) and
always find a slight ooze coming out the weep hole.  It can be
described as an always moist spot, but not dripping.  It never gets