20 Most Recent 1989 Chevrolet C1500 - Page 7 Questions & Answers

the trans dip stick is usually towards the back of the engine, the oil dip stick is usually more accesable in the front.

Just the lights?

I"m not sure what the problem is, this sounds like the engine light is coming on because its overheating and you replaced the airpump and alternator and now you thinks it is the thermostat. if this is correct then yes replace the thermostat and also check the fan clutch, when engine is hot the fan should not spin freely. and last are you sure the engine light is on due to it overheating, if it is due to overheating then check fan clutch and replace the thermostant

I used to do some wiring repairs at a GMC dealer,89 trucks were still fairly new at the time so didn't see a lot of problems.I do remember a couple of Safari vans and pickups that would get a broken wire in the harness "boot" from the door to the jam.The harness can usually be disconnected with a couple of large plugs behind the kick panel.If a wire is broken to something in the door,it's probably in the boot(these wires bend when the door opens/closes).Use a multimeter and the wires color code(every wire has different colors/stripe colors)to find the broken one.If you do find the break,run a new piece of wire to a point in the door and cab past where it will bend(learned the hard way when I spliced the wire inside the boot,trouble came back in 2 months)

It should say on the intake if noti think the right side is 1 3 5 7 left is 2 4 6 8 if it back fires or dont start switch it around .