GM buying back truck and SUV's.
#22
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TECH Senior Member
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Joined: Apr 2002
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From: Truck Heaven
I was very pissed when I found out my 01 ticked then a heard a knocking 5.3 and really freaked the hell out of me. That **** was loud like metal to metal knocking. I kinda felt better that my truck did not knock.
#25
Now as far as knocking goes, my truck has some pretty bad spark knock above 4K rpms when on low octane gas. It sounds like you put a rock in a tin can and shake it fast and violently.."CLACK CLACK CLACK CLACK CLACK!"
Some 92 octane or better solved that, and now it pulls hard for a stock truck without the noise (other than the harmless start up tick). I guess my either my knock sensors don't work or the computer isn't reading it correctly. Either way 92 octane is fine by me, it's like a factory performance tune!
Some 92 octane or better solved that, and now it pulls hard for a stock truck without the noise (other than the harmless start up tick). I guess my either my knock sensors don't work or the computer isn't reading it correctly. Either way 92 octane is fine by me, it's like a factory performance tune!
#26
TECH Enthusiast
Joined: Nov 2002
Posts: 518
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From: Jacksonville, Fl
My Tick you can hear going down the hwy at 90mph. I have had friends tell me about it when they are next to me. Hmm....Might need to take my truck to my buddy at the dealership.....maybe an '04 will be nice. Just change all my stuff over!
#27
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TECH Senior Member
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Joined: Apr 2002
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From: Truck Heaven
I also came across this. Very interesting article.
http://www.freep.com/money/autonews/...4_20031114.htm
http://www.freep.com/money/autonews/...4_20031114.htm
#28
Teching In
Joined: Oct 2003
Posts: 19
Likes: 0
From: Jo. County KS
I bitched about that knock since I bought my 2000; Called the customer service 1-800- number and filed a complaint. Took truck back to dealer for evaluation.
Customes service extended the warenty on the engin to 100,000 miles. I started running Mobile 1 oil and it seems to have disipated, or I just dont here it as much. There is a service bulitin out on the lifter ticking noise. They say that it is caused by a bad O-Ring in the oil pump. You may want to get that addresed ASAP
Customes service extended the warenty on the engin to 100,000 miles. I started running Mobile 1 oil and it seems to have disipated, or I just dont here it as much. There is a service bulitin out on the lifter ticking noise. They say that it is caused by a bad O-Ring in the oil pump. You may want to get that addresed ASAP
#29
Originally Posted by bumpstick
I bitched about that knock since I bought my 2000; Called the customer service 1-800- number and filed a complaint. Took truck back to dealer for evaluation.
Customes service extended the warenty on the engin to 100,000 miles. I started running Mobile 1 oil and it seems to have disipated, or I just dont here it as much. There is a service bulitin out on the lifter ticking noise. They say that it is caused by a bad O-Ring in the oil pump. You may want to get that addresed ASAP
Customes service extended the warenty on the engin to 100,000 miles. I started running Mobile 1 oil and it seems to have disipated, or I just dont here it as much. There is a service bulitin out on the lifter ticking noise. They say that it is caused by a bad O-Ring in the oil pump. You may want to get that addresed ASAP
mine has a slight tick, but not bad.


