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With the underdash wires can't help you there. I'm planing on autometer gauges

I have psi harness also. But i have a 91 silverado and i just took out every thing or cut it. You don't need the stock ecm only if your going use the trucks tranny, if yours upgrading to 99- up...

i just got on3 78/75 turbo.and i was wondering would it hurt to use 3.5 down pipe or just use 3'' pipe.

What would y'all recommend to gap the rings to?i was thinking .028-30 top ring and .030-32 on second ring

130 bout 10 Sec pass right? Since i have it I'm going to run it then later i was plan on get a tu1.5 or tu2. My goal is low 10 or high 9s with 5.3. Set up I'm planing is stock 5.3 ls9 head gasket and...

Yeah the plan to run a cam in it.go to i have which a bit big oh well cam spec( 230/236 591/601 112+1) should do ok. From what y'all saying i might as well gap rings. What would be best gap. Was...

I have 06 5.3 with s475 turbo, planing for close to 850wrhp. Would i need to gap the rings or would y'all just run with it how its and just put ls9 gasket and head studs

Has anyone used lokars lok-aca-1800 on there 88-98 ls/4l80e swap?

Its could. Be be a ground that's messed up like farmtruc said.my step brother has the same truck but 4.8 and dealer had to replace the whole engine harness!

do What gagliano7 said and after bout 30 MIN filling and reving the engine let it set at idle for another 30 mins, at idle is where a car get it hottest point!

My bad 2wd

Get some help put it in...them some heavy bleepers.you need the flexplate for it and spacer if it takes on(idk) new tune tranny line longer(the rear line)..that's all i can think of

I have 91silverado with 5.3/80e what ujoints to get?

Just finish drilling the whole till you see no more bolt an just retap it. Alot easier and maybe cheaper

I have read with a drop your best bet Is a H3 pan

Only wires you need is ignition. And stater and the 8ga red wires

what year was the white on and the red one! i like the red the most :) only cause im painting my red

Should be 65e bud

What year and model number?

**tsp

220 ,224 from tap speed or from thunder racing

Jon at psi help me out with a few questions I had...cool fella! And your welcome if you any other question just ask

If maf is good, while runing it usally shuts off. If bad it would run like crap.

A bad or dirty map will bring on o2 sensors. Try and see if crank relearn fix don't hurt to try! You could just take your intake off and see if you pinch a wire or what

It be only ran in the 5.3 till I save for a lq4-or lq9 which ever I can find better deal on.