Search Results for ‘5.3’

I have a 2004 Trailblazer EXT LS 5.3. The waterpump went on it the other night. I replaced with a new waterpump and thermostat. I did check the thermostat to make sure it was opening. I refilled the system with dex cool mix. Now I get no heat out of the vents and the engine overheats. I have...

we have a 2006 GMC Envoy Denali, it has had an intermittent SERVICE STABILITRAC light, sometimes under semi hard acceleration, sometimes braking hard, so no real pattern , the SERVICE 4WD light is also intermittent and random, however as of yesterday it did something new. The service 4WD light...

Hello everyone I just got myself a 2006 Trailblazer with a 5.3. It needs a few things, like a head gasket, which I'm not really worried about bc thats well within my wheel house. But there are some other things I'm questioning like for example the power steering on it is dead with no fluid in...

2005 GMC Envoy XL Denali 5.3L 170,xxx Miles Back story: about two years ago I had issues with the car intermittently cranks but wont start. I tried and ignition switch with no luck. did some more checking of the fuse block and read lots of issues with the fuse block so I went and ordered one...

As said in the title I want my engine immortalized. I've read extensively on it but would like to hear tips and tricks to hopefully fill the gaps or oversights I may have. I have experience with the standard 4.8 but this engine is a bit different. My engine is an LM4 with 799 heads, same as the...

I have been eyeing these ignition coils for my Envoy. I just had a coil fail on me just last night. I want to upgrade to the best of the best, but I keep coming across these and the reviews seem good, but I need to know if anyone on this forum has them installed and the procedure of care?

I have been trying to work through a rough engine idle that began after I changed the plugs and wires on my 2008 Saab 9-7X 5.3I. Besides a spark plug issue I posted about in another thread, I was looking around by the firewall tonight and that left me with several questions that I'm hoping...

I have an '06 Envoy Denali with the 5.3L Vortec V8 and about 6 months ago the engine seized up and I had a rebuilt one put in. There is a 100k warranty on it but now it shifts into 2nd weird.. Almost like it hesitates. The truck has around 140,000 on it and I was wondering what you all think I...

Well my 4.2 liter inline 6 threw a rod this morning and i lucked out finding a 2004 5.3 liter for 400$ with PCM and complete harness, so now its time to start the swap, I've already got a pretty good idea of everything I may need Only deal is the 5.3 came out of a pick up so I have to check my...

I had my engine run low on oil for a short time. This locked up a lifter and now I am having all lifters replaced. The machanic recommended changing the cam because of the discoloration. Looks likes normal wear to me. Check out the picture below..What are your thoughts? The cam is smooth, no...

I need to find a replacement for mine. I don't have $7k+ to put into it, I do not want to go Jasper, and I am having trouble locating anything used. The closest I found was from pickups, but the mechanics don't know what makes it different to chance the swap. I was also under the impression...

I'm wondering if anyone has installed the Stainless Works Headers or True duals for the TBSS on a TB with the 5.3 (swb)? I'm thinking about doing it on mine. I've spoken to the people at Stainless works and they said the headers should work ok since the 6.0 and the 5.3 are the same but they...