2003 GMC Safari Questions

All 2003 GMC Safari Questions

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The van was electrically dead after driving it a half hour before. When we tried to jump it, it almost caused my buddy's truck to die and over heated the jumper cables. Took out the old battery and when installing the...
Doors do not lock when the engine is off but lock normally when engine on and transmission put in in drive. When trans back in park, doors remain locked. It unlocks when engine switched off. Off function of locks is c...
Error Code P0102 Problem occurs only at highway speeds. Previously got Check Engine Light on with code P0101 that was resolved last month by replacing MAF Sensor. What more should I have done to avoid issue returning?
I have 112,000 on my van and want to know if I will create any problems if I switch to a synthetic oil.
New blower will stop completely as you drive (or even just sitting) and then may come back on or be working the next time the van is started. If the resistor should allow it to at least run on high,what else might it be?
My blower fan for the AC/Heater will work, and then it cuts out for a day or two, and then comes back on again. This has happened 3-4 times in the last couple weeks. Any idea's of what may cause this? I just had a new...
Sorry to be such a pest...but I'm in need of your expert advise regarding the two air vents on the floor behind the drivers and passenger seats, on the floor, facing the back of the van. I had the blower motor replace...
The 2-vents (1-each) on the floor directly behind the driver and passenger seats are "not" blowing any hot air when both the front and back fan blowers are on high. "All" other vents are blowing air through them excep...
a/c or heater not blowing air from front vents. you can hear the blower motor, but can barely feel the air. high setting also not working. only med. and low work. please help.