1991 GMC Sierra "91" Questions

Ok I am wondering if my motor in my 91 gmc 5.7 l b8 is a vortec or a 350 it has throttle body carb and not sure thought if I could interchange it with an older 350 .. Here, is what I think you are ...

set the clock on 91 gmc truck. Battery was replaced and I need to set the correct time. With the radio off, hit set then use the scan and seek buttons to set the time. When you are done, hit the set ...

does a 1991 gmc 1500 have a cabin filter? No, it does not. I cannot find a cabin air filter listed for a '91 GMC Sierra 1500. Sorry :(

i can only get my 91 gmc truck to go into fourth gear or neutral gear Unless the linkage is rusted or broken, your pulling the trans & taking it apart

91 gmc Sierra 5 speed standard won't engage reverse switch. fuzes and bulbs are good. Lights work when I hit the switch by had but not when I shift into reverse. see notes

how do i remove a heater core on a 5.7 liter motor is there any easy way to do this it was leaking on to my floor board you left info for a 91 gmc sierra no such thing try again

my tail lights dont work when i turn on my headlights for a 91 gmc sierra I have no turn signals or tail lights when i turn on my head lights. What is wrong? Possible battery Voltage issue or more ...

1992 gmc wont start. new starter, new battery. just clicks I had an 84 silverado & a 91 sonoma with the same problems. It was a ground wire. Make sure all body, & frame wires are Attatched, tight & ...

91 sierra heater control display comes on shoes fan on low temperature centered vent on floor but none of the controls work Could be the controller. Check the vacuum line from the engine to vacuum ...

91 GMC Sierra grinding sound as it is put into park It sounds like your linkage is out of adjustment....When you place it in park it is not fully disengaged from reverse...This is a common reaccuring ...