How do I change the white backup lights on my 94 chevy suburban? It's not in my manual. Thanks

unplug your battery terminal positve or negative one.
wear a glove for safety

Below is a picture for you and there is also a second ground dealing with thestoplamps that will be located in the right hand door piller. Rear door if it's a 4 door. I hope this helps and good luck.

Check http://www.etrailer.com/faq-wiring.aspx.

start engine and bring to normal operating temp. unplug the base timing connector located in the distributor wiring harness tan wire with a black stripe use a timing light and set timing to 0 degrees at idle the timing marks are on the crankshaft pulley and a tab on the timing cover with numerical indications

i have a 1999 chevy suburban it drives forward just fine **** no reverse

You need to attach the blue wire on the stereo harness to the blue and white wire on the car adapter harness. they installed a small amplifier to power the rear door speakers and unless you connect those two wires then the speakers will not work.

the problen is probably the turn signal switch with a test light check for power at brake switch if no power check for power at turn signal switch the brake lights are incorperated through the turn signal switch

check the catalytic converter they clog and keep them from running right.i have a 94 suburban that wqas doing the same thing and it was a clogged converter

timing chain

Glad you have figured it out, congratulations.