Well after a year of ownership the motor blew cylinder #5. The piston, connecting rod and near by parts blew into pieces including a crack in the block. Thank god for the extended warranty!!!!
I've had the P0171 code that I've been trying to clear for about 2 weeks and finally the motor blew on the highway. Luckily no one was injured and was safely towed back to the shop.
I've been running an aftermarket air filter with stock airbox and resonator and the only other power mod was a flowmaster muffler in place of the oem muffler.
I got the PCMtuneforless done about 2 months ago and had the CASE CEL which was finally cleared.
After the CASE relearn I replaced my spark plugs (@ 75K miles) and serpintine belt along with the tensioner pulleys and the truck ran great, finally could REALLy feel the difference from the tune. It ran good for a week and all of a sudden I started getting a missfire (still no P0171 yet).
Fuel injector #5 was completely clogged (no idea how, it was not spraying at all!) so got that replaced. Now after another week or so the P0171 came on and found out that my intake manifold had a crack! It was causing a whistling noise at idle.
The previous owner/dealer who did the head gasket replacement under warranty must of damaged it during reinstall. So thinking thats what was causing the P0171 I got that replaced as well!
I have a scangauge and the car ran fine with this code present. I was able to clear the code and even pass NY-State inspection. But the code would kept coming back after 20~30 miles.
Went online and tried the suggested methods for P0171 which was a MAF cleaning spray along with Chevron fuel injector cleaner. That worked actually, the code went away by itself BUT it came back on after 50 miles or so and it kept coming on and off!
Thinking my MAF was just maybe busted, I got that replaced and it actually made it worse (it was OEM MAF from GM). The P0171 would now come on within miles of clearing it with my scangauge. Even clearing it with a tech II scanner would just make it pop up right on.
I gave up, was planing on trading it in soon anyways and just kept clearing it. Then BOOM! the motor went out.....
Luckily my warranty covers this and is getting a rebuilt complete motor/head put on.
Just wanted to share my story, P0171 was no joke! But still not sure what caused the P0171.....
I've had the P0171 code that I've been trying to clear for about 2 weeks and finally the motor blew on the highway. Luckily no one was injured and was safely towed back to the shop.
I've been running an aftermarket air filter with stock airbox and resonator and the only other power mod was a flowmaster muffler in place of the oem muffler.
I got the PCMtuneforless done about 2 months ago and had the CASE CEL which was finally cleared.
After the CASE relearn I replaced my spark plugs (@ 75K miles) and serpintine belt along with the tensioner pulleys and the truck ran great, finally could REALLy feel the difference from the tune. It ran good for a week and all of a sudden I started getting a missfire (still no P0171 yet).
Fuel injector #5 was completely clogged (no idea how, it was not spraying at all!) so got that replaced. Now after another week or so the P0171 came on and found out that my intake manifold had a crack! It was causing a whistling noise at idle.
The previous owner/dealer who did the head gasket replacement under warranty must of damaged it during reinstall. So thinking thats what was causing the P0171 I got that replaced as well!
I have a scangauge and the car ran fine with this code present. I was able to clear the code and even pass NY-State inspection. But the code would kept coming back after 20~30 miles.
Went online and tried the suggested methods for P0171 which was a MAF cleaning spray along with Chevron fuel injector cleaner. That worked actually, the code went away by itself BUT it came back on after 50 miles or so and it kept coming on and off!
Thinking my MAF was just maybe busted, I got that replaced and it actually made it worse (it was OEM MAF from GM). The P0171 would now come on within miles of clearing it with my scangauge. Even clearing it with a tech II scanner would just make it pop up right on.
I gave up, was planing on trading it in soon anyways and just kept clearing it. Then BOOM! the motor went out.....
Luckily my warranty covers this and is getting a rebuilt complete motor/head put on.
Just wanted to share my story, P0171 was no joke! But still not sure what caused the P0171.....
