OK I have a 99 camaro gauge was working fine till I got new pump. Dropped tank by lowering the exhaust. Now nothing on gauge. I checked all wires from sending unit to the connectors behind back driver seat. Also replaced gauge cluster and all gauges work. I am trying to find where wires run from backseat to cluster. If anyone can figure out what is wrong with this issue or know where wires are I am all ears. I have stripped almost everything but carpet and my buddy and I am frustrated with this. Please help.

 

Have you check the sending unit with an ohm meter? Maybe it got suck or a wire got knocked off during the pump install?

 

Yeah I have trap door so right now its completely out

 

this is for 93-97 but i believe the wiring is the same for fuel tanks.
4th Gen LT1 F-body Tech Articles

 

Everything from pump to pcm is good. I have taken dash out and found lots of loose wires that are hard to know exactly where they go. But the purple wire I know is still intact and from pump to pcm I get continuity and ground also the same. I will run a test from pcm to gauge to see if pcm is problem or wire. Also when I connect gauge it does move for test but that's it.

 

Oh and also the service vehicle and airbag light has been on. Anybody know anything on that

 

ses means it shoule have trouble codes. have it scanned for codes if you can. air bag could be in the column wiring or the mess in the dash

 

Not "service engine soon" which is by the security light. Its "service vehicle" under bright light indicator and 0 rpms

 

so the sender ohms out when the level float is moved up and down?

 

Yeah I had a spare one to even check it to and they read exactly the same