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1492 messages,  Last post on Oct 12, 2006 at 5:32 AM

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What is this discussion about? GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Truck

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#1020 of 1492 Re: 1994 GMC Sierra 1500 Failing Emissions...Low Idle Cyclical Stalling/Surging [jstrong] by wolfdog May 12, 2005 (12:33 pm)
Replying to: jstrong (Apr 15, 2005 6:44 am) i am also having this problem and was wondering if you had any hits? Replies to this message: damurph (May 15, 2005 10:00 am) jstrong (May 16, 2005 7:02 am) canamguy (Jun 17, 2005 10:35 am)
#1021 of 1492 Front end popping by claw May 12, 2005 (6:41 pm)
I just purchased a 1998 GMC 2500 3/4 T Serria.73,000miles. It hasnt been maintained too well, but over all a good buy and pretty good shape. I had to replace the water pump, tires, brakes. What is driving me crazy is the popping in the front end as I turn. Nothing on inspection showed wear and needing to be replaced. A front end man told me there was aa recall on this front end. he claims that the way the dealer fixed the popping was by placing a certian kind of grease in the joints. I cant believe this, but it does not pop as bad after you grease the front end. After one week of driving the popping returns gradually and prossiveily louder......Comments welcome. Replies to this message: weels (May 15, 2005 8:22 pm)
#1022 of 1492 Re: 1994 GMC Sierra 1500 Failing Emissions...Low Idle Cyclical Stalling/Surging [wolfdog] by damurph May 15, 2005 (10:00 am)
Replying to: wolfdog (May 12, 2005 12:33 pm) I have a 92 GMC Sierra 1500. I had a problem with idle cycling between stalling and surging right before my fuel pump went out. After replacing the fuel pump I could start the truck, it would idle a little rough, then surge and die. I found the more severe problem to be a vacuum leak.   I hope these potential problems point you in the right direction.
#1023 of 1492 Re: Is there any help out there!!?? [mekchalngd] by tconover May 15, 2005 (5:31 pm)
Replying to: mekchalngd (Apr 27, 2005 9:50 am) My 2000 Jimmy makes to same noise. At around 45-50mph it sounds as if a fan is turning off and on. I've had this problem for awhile now and it is getting worse. It now makes the noise almost all of the time. Anyone find anything out about this?
#1024 of 1492 Re: Front end popping [claw] by weels May 15, 2005 (8:22 pm)
Replying to: claw (May 12, 2005 6:41 pm) How are the upper ball joints? If you end up changing them - get the TRW's.
#1025 of 1492 rds radio lock codes by weels May 15, 2005 (8:30 pm)
I got a new radio from a friend who didn't want it. We both have '04 2500HD pickups.  I originally had just a radio, and I stuck his old one w/CD player in my dash and it's locked.  Apparently the RDS radios aren't as easy to reset. These aren't the BOSE units - just the GM's. Any one have a clue if I can reset this or should I buck up and take it to a dealer? Thanks - Tim
#1026 of 1492 Re: 1994 GMC Sierra 1500 Failing Emissions...Low Idle Cyclical Stalling/Surging [wolfdog] by jstrong May 16, 2005 (7:02 am)
Replying to: wolfdog (May 12, 2005 12:33 pm) wolfdog,   I had one hit indicating that it could be the fuel pump going out...I had the gas tank off a year ago to replace the brake line and had to take the pump off because I broke the ground lead and had to drill through the plastic electrical housing to resolder the lead...coincidence? I did replace the gas filter and that did not solve my problem. I haven't replaced the fuel pump as of yet...   Now, I have taken a second look at the EGR valve. I took it off and cleaned it and tried to make sure that it was closing at idle. I didn't see any problem with it and stuck it back on. However, recently I disconnected the vacuum line, stuck a golf tee in the vacuum line and have been running it around and have noticed that my surging has cleared and the truck is running well. At highway speeds, after warmup, the Check Engine light comes on as expected, but the truck runs fine.   My assumption at this point is that the EGR valve is spring loaded and lost enough of its closing strength that the small vacuum present at idle is enough to keep the valve open and cause the stumble I am seeing at low throttle. At least I hope it is because I'm going to replace it shortly...   Another thing that has come to mind is that possibly there is too much vacuum at idle, indicating a malfunction of the EGR valve vacuum solenoid...It's probably the EGR valve because it takes alot of abuse in the form of heat and it is the original. Unfortunately, I don't have a vacuum gauge to give a definitive analysis.   Good luck... Replies to this message: canamguy (Jun 17, 2005 10:35 am)
#1028 of 1492 vibration by dhealey05 May 18, 2005 (3:26 pm)
I own a 1998 gmc sierra extended cab 2wheel drive. Which has developed a vibration that no one can pin point. It seems to be comming from down in the under carriage or drve train not sure.. All u-joints and carrier bearing and tires have been checked. ?? Replies to this message: weels (May 19, 2005 3:39 am)
#1029 of 1492 Re: vibration [dhealey05] by weels May 19, 2005 (3:39 am)
Replying to: dhealey05 (May 18, 2005 3:26 pm) I have a 98 tahoe and ours was doing that too. I did replace the rear u joint and it seems better. I bought one with a low profile grease fitting on the end of one of the cups. It's easier to lube than the other kind.  If that aint it, I've always been suspicious of that EVO switch for the steering. They go bad very frequently on these trucks and when they do, they sometimes make it do some really weird stuff. Mostly the steering is affected, but I just don't trust it - wish they never put it on the vehicle. - Tim

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