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Pickups Chevrolet Silverado & GMC Sierra Chevy Silverado/GMC Sierra - Owners hangout 
5688 messages, Last post on Oct 17, 2006 at 8:34 PM
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I just traded my 97 Extended Cab Z71 in for a 2003 GMC Sierra HD Crew Cab 4x4. I have noticed that the ride is much rougher in the new truck. I know that it is built on a 2500 frame and I am assuming that there is a big difference in the suspension from my old truck. My question is, what can I do to make the new truck ride smoother? Change the shocks?, if so what should I change them too? Change the leaf springs? if so, I need some details on how to go about this. Change the tires? if so, what size? I need some help here, the new truck is giving me a headache! Thanks for the input! |
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I have a 01 GMC Sierra ext-cab 5.3 V8. This truck is great! I purchased this truck used with 18,000 miles on it and have not had a single problem until now. After 34,000 miles the idle is rough and very low when coming to a stop. Occasionaly the engine will stall. At speeds above 10 mph there is no problem. Dealer suspected alternator but after checking and running diagnostics could find no problem. The truck wants to stall when in gear at low idle but in park is somewhat better. Now at 43000 miles, and out of warranty, the AC compressor will shut off also at the low idle and seems to make the problem even worse. Injector cleaner and premium gas do not help. I have seen this problem posted before on a 2001 5.3 engine but no suggestions as to the problem. It acts like a vacuum line is leaking but they all appear OK. Any Ideas? |
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Thanks, If I had a bad cat would it possibly have a soft code in the computer? What about timing, could this do it? I do not have to have the exhaust tested in Ill. I agree with you it is not fuel. It has to be once the fuel has entered the motor. |
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Chuck, Will the 2004 Z71 Crew Cab be built on a 1/2 ton frame or a 3/4 ton? Will it be a true Z71 as we know it today(suspension, frame, etc.) just with 4 doors or will there be some more heavy duty trailering stuff added to itlike the 1500HD? |
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You would think that a code should appear or even the emission light. Then again, this is not an exact science so I'd have them checked as there are two. They can replace the O2 sensors at the same time. There is no timing adjustment avaiable unless reprogramming. For that you would need a tech2 and usually only a dealer would pay the $3k for it. |
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the 1500 Z71 CC is built on the 1/2 ton frame the 1500HD CC is now called a reg 2500 i believe |
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| I've seen your postings a few times on the rough idle at low rpm's. Sounds exactly the same as the problems I'm having with my 5.3 engine. Did you ever find the cause? | |
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I hear ya about the rough ride on the 2500. I went from a 97 1/2 Z-71 x-cab 4x4 to a 01 2500 4x4 x-cab. I got used to it tho. A couple 100 lbs. in the bed smooths it out tho ! |
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Take your truck down to any major muffler chain. They will test for a plugged cat. conv. for FREE ! Ryan...didn't your dads old truck have a bad cat. a while back? |
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| yea it did. Truck would die just pulling out of the garage. New cat and muffler all under $200 | |
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