It is a GMC Top Kick 4x4
They'll all have an oil dipstick, no matter what engine you have in it.
It has a Cadillac body, but is built on a GMC Top Kick chassis.
They use shims under the cap that's on the top. You can get them from a GM truck dealer or from an alignment shop.
Varies according to specific model. The Top Kick was available as a Class 4, Class 5, Class 6, Class 7, or Class 8 truck.
Your car has a combination signal/hazard flasher. It's plugged into the "convenience center" which is mounted at the top of the left kick panel.
If it is a 350ci engine the order is 1-8-4-3-6-5-7-2
Need to specify the model. GMC made trucks ranging from the Class 1 S-15 all the way up to Class 8 variations of the Top Kick.
You need to remove the top head light by unscrewing two bolts on top if the lighting assembly. once the head light is out of the way you pull out the turn signal lamp and replace it.
Check the ground wire that on the top front of the engine. Mine did the same thing. When I made a good ground it went away.
If you're talking about the differential gears, 75W-90 is something of a default for medium- and heavy duty trucks.
all you have to do is unscrew the cable from the top of your transmission, then from behind tbe actuall speedo