Forum: Diagnostics & Troubleshooting

My 5.3 swapped 98 GMC is driving me nuts, since ive had it running, only twice where the thing has run like a scalded dog and left 50 feet of rubber...

LS newb here so please be gentle :) This is (likely) a '98 LS1 swapped into a '97 Suburban. I bought it already swapped, needs lots of wiring...

I've been having a pretty rough idle for about a month now. I took this video today after swapping out my PCM. It's idling just like it was before I...

Whenever I try to start my truck after it's been sitting a while, it cranks a couple of times, busts off at a real low rpm and sounds like it's about...

2002 5.3L LS in a 1998 tahoe. I have had a bad misfire from day one.... took my plugs off the ecm and checked continuity on all of the injector...

Where is the best place to look at or for different references like frame diagrams and so on. For instance like exploded diagrams. I am looking...

The back story. I recently swapped a 2001 5.3 LM7 into my 1998 K1500. I rebuilt the engine but reused a lot of the peripheral components. Since...

Thought I saw a thread somewhere on here for those of us that have swapped LS engines in OBS trucks to make one touch starting like the newer trucks....

My truck died on the way to the lake. When I was going down the on ramp to merge onto the interstate, the engine fell on it face and would not...

I am new to this site and would like to start by saying thanks in advance for any help which I may receive! I built a 5.3 for my 01 z71 I put...

I recently installed a racetronix 340 pump in 2008 sierra came with harnes kit bulkhead connector and fuel sock. Pump works fine at idle and half...

My 4.8 keeps cranking with the key off but I can disconnect the battery then connect it back and it doesn't do it again until I hit the key. Wtf is...

I just bought a giant turd with a 5.3l on a stand alone harness. I am having problems with it sputtering so bad it wont even move when its cold. Once...

Ok 6.0 230/250 keeps throwing the cam pos code high and low but usually just the low, usually after stalling up or going WOT, ive changed the cmp...

I swapped in a 5.3 in my obs After the engine begins to warm up it cuts off I dont have the exhaust hooked up yet still with open headers I...

I just got done swapping a 4l80e in my 95rcsb and all is well except I'm only counting 2 shifts and converter lock up. It has 3.42 gears and turns...

Hey guys. I was on my way to a festival about 2 hours south from home yesterday and when went to pull off the interstate ramp onto a country road I...

Just got done with my 4l80e swap and got it buttoned up today. Took it on a test drive and it spits and spiders under 4k rpm and no power. After 4k...

We have a 2000 Silverado 1500 with the 4.8. It has a surge at anything under 1200 rpm. If you snap the throttle it will hang at 18-1900 rpm and drop...