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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for January 31, 2005
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Open Help Requests for GM
Help Request Answers
1999 Buick LeSabre Custom 3.8L Serpentine Belt VIN: 1G4HP52K8X
If any one has run across this problem please let me know where the fix is. Thank you!!!
1985 Chevrolet Celebrity 2.8L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Poor Fuel Economy VIN: 1C1AW19W7F
vehicle originally ran so so had lack of power so i changed the spark plugs wires cap rotor and o2 sensor. vehicle ran worse replaced injector no change. replaced pcm no change. Right now vehicle won't idle. runs ok at 2000 rpm but runs extreamly rich. I and m...
1991 Chevrolet R1500 Suburban Scottsdale 5.7L no spark VIN: 1GBER16K3M
well thanks in advence.this one has got me suburban came in no fire i tested all new parts even changed with known new parts it has 12 volts to coil at start and run positions. changed out computer with known good one still nothing no codes on otc genesis even...
1996 Chevrolet Corsica 3.1L No Start, Misfire VIN: 1G1LD55M4T
car towed in no start. Bad fuel smell oil diluted with gas. Removed fouled plugs and replaced with new delco plugs. changed oil and filter. car would barely start and only for a second when held in wot flood mode and would run bad and stall after 15 seconds. s... Trouble codes: P0300
1997 Chevrolet K1500 5.7L Misfire, MIL Lamp on
Hello to all the great Techs out yonder, I have a very unusual problem with this "generic" farm truck. Excuse me for not listing all of the tests done but maybe some one has seen these symptoms. I just recently replaced lwr gaskets for leaks, r+r 2 lifters for... Trouble codes: 0300 (multiple cyl misfires)
1997 Chevrolet K2500 5.7L Steering VIN: 1GCGK24R8V
The steering on this truck is extremely easy. The steering will not re-center after turning. It does not pull or jerk as in other posts I have investigated. It has way too much assist all the time. The wheel sensor was replaced twice before I got the truck. Os...
1998 Chevrolet Blazer 4.3L 4 wd VIN: 1GNDT13WXW
This blazer won't shift into 4wd hi or lo it is a push button system with a button for 2hi, 4hi, and 4lo. when you try to shift to 4hi the light for 4hi comes on briefly and you can hear the transfer case control module click but then it goes right back to 2hi...
1999 Chevrolet Blazer 4.3L bearings VIN: 1GN0T13W2X
3rd engine that developed a knock after about 300 miles after replacing intake gaskets. saw the tsb from gm about overtightning manifold bolts causing a distortion in the block & wiping out the main bearings but i dont buy it. torqued to spec with dealer gaske...
1999 Chevrolet Blazer 4.3L Charging VIN: 1GNDT13W3X
Hello all, This Blazer belongs to a regular customer of ours. He recently purchased it used. The problem he has is while idling or while driving down the road, the voltage surges. He says that the lights will dim and then brighten, the gauges will drop (inclu...
2000 Chevrolet Impala LS 3.8L brake lights, turn signals VIN: 2G1WH55K2Y
this vehicle blows both turn signal fuse and brake light fuse about every 3 days. i replaced the hazard switch just on a hunch since both circiuts have that in common. came back 3 days later with both fuses blown. i replace fuses in shop and everything works f...
2000 Chevrolet Silverado 1500 5.3L Belt VIN: 1GCEK19T6Y
This vehicle ,& a few others we've seen in the past couple of years, break the compressor belt. I suspect the belt is getting the 'shock' treatment upon compressor engagement due to liquid lock. The compressor is mounted very low and I'm thinking liquid refrig...
2002 Chevrolet Express 3500 5.7L 2 way radio VIN: 1G3NRY4VWM
This started easy but went bad Driver came in saying his nextel phone does not work when van is running (out of service) and the 2-way radio receives only staic when receiveing I swaped the 2way with known good. change antenna,rewire radio as to a TSB from GM ...
1993 GMC Jimmy 4.3L Poor Idle Quality, Surge VIN: 1GKCS13W3K
Production date of 9-1993, 4.3 cfi vortex vin w motor. The problem with this Jimmy it will idle in gear, fine sometimes,(when I mean fine, you can't feel it run), then all of sudden you may come out to vehicle and it has a rough idle. Alot of work has been don...
1995 Oldsmobile Silhouette 3.8L Charging VIN: 1GHDU06L5S
hi just wanted to see anybody has any input we replaced the alternator 1 week ago cutomer had broken down put his own battery in it came in said he wanted his alt replaced was not charging we replaced alt charged off and on replaced alt again same thing found ...
2002 Oldsmobile Silhouette GLS 3.4L right slide door VIN: 1GHDX23E71
Hello everyone Im haveing a problem with the right slide door on this olds van. the door has the auto open feature and wors well but if you lock the door it is hard to unlock, you can work the manual lock but it stays locked in the down position, it will come ...
2000 Saturn SL1 1.9L ign switch VIN: 1G8ZH5284Y
I know that this is not a particularly high tech question and the world isn't going to spin off of its axis if we don't come up with an answer but the guy is really in need of help so if someone has any experience in this area it would surely be appreciated. ...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Century Custom 3.1L prndl readout VIN: 2G4WS52M3W
Thanks Justin [...] for very helpful information. As it turns out we were on the right track but didn't know why. Now that we know why we can be helpful to the next guy. The PRNDL or in this case PRND321 switch on the transmission has 4 switches in it. R...
2000 Buick Century Custom 3.1L Gauges, shift ind. light VIN: 2G4WS52J4Y
Sent vehicle to dealer, they found bad BCM, replaced under warranty. because of low milage (6000). All is well & everybody happy. Thanks for your time & efforts. Regards Mike
1987 Chevrolet R30 Custom Deluxe 7.4L No Start VIN: 1GCHR34N4H
hello and thank you to all that responded to my post. most replies were related to the distributor,pick-up coil,distributor shaft magnet (reluctor). one post said that there should be about 800mv on pick-up coil using a low current probe. i tried this, but did...
1994 Chevrolet S10 Blazer Tahoe 4.3L EGR system VIN: 1GNDT13W2R
Thanks for all the help. Most people said to install a gasket with a screen in it. Will have to remember that and get some for future use. Sorry I did not include that I did do a compression test and leakage test. No problems found with that. Some people also ...
1996 Chevrolet C1500 Cheyenne 4.3L Brakes VIN: 1GCEC14W5T
Thanks to all the members who replied to my help request. After checking the dump valve and the abs unit i still could find nothing wrong. Some of the members mentioned they have had wheel cylinders suck in air and not leak. I decieded to try replacing the new...
1997 Chevrolet Astro 4.3L slip VIN: 1GNEL19W0V
Well I think everyone hit the nail on the head, shift kit in valve body and a new torque. All is well Thanks for the great info.
1999 Chevrolet Express 2500 5.7L Misfire VIN: 1GCGG29R9X
Thanks for all the responses!! First we did a BG inductive cleaning, this helped a little. Rechecked all paramaters again especialy the cam timing 0'. We were using a Snap-on scanner, just for kicks tried a mastertech scanner and it showed -14' hmmm. Reset cam...
1999 Chevrolet K1500 Suburban 5.7L No Start VIN: 3GNFK16R4X
it was my bad, I check for spark with a reg. spark tester not HEI tester. had spark until check with HEI tester ended up being bad cap and rotor
2001 Chevrolet Silverado 2500 6.0L transfer case/differential VIN: 1GCHK24U91
I received four replies on this request. One had the same problem on his 30k miles truck, t-case and front diff rebuilt no change, two about the splines not lubed on the slip yoke, and one advising about general wear. I knew about the splines, in fact we stock...
1990 GMC K1500 Sierra 5.7L batteries VIN: IGTEKI4K2L
Thank you for all the great information. The extra system is most likely added to power a camper, yet able to be recharged with pick-up charging system and protect main battery from being discharged. Thanks again
1994 Pontiac Grand Prix SE 3.1L Misfire VIN: 1G2WJ52M7R
this one is fixed. i spoke to the owner over the weekend and it is all good news. i got 12 replies and they covered everything. alternator harness, a relay, a/c ripple, ignition wires, module, fuel pump and filters, plug wires and ecm, intake and head gakets a...
1997 Pontiac Grand Prix SE 3.8L abs VIN: IG2WP12KXV
barrowed a tech 1 from a buddy / found motor pack was bad / replaced master cyl. unit with a used one / all is well / thanks to the five people who replied !!!
2000 Pontiac Montana 3.4L MIL Lamp on VIN: 1GMDX03E5Y
thawed again re checked valve and solinoid opperation. drilled small drain hole in motor cover to act as drain and returned to customer. ill know soon enough, or spring will hit chris Trouble codes: P0410.
1996 Saturn SL1 1.9L coolant VIN: 1G8ZH5282T
duane rasmussen hit the nail right on the head...found alldata tsb. not what i wanted to hear but the head is cracked on #5 cam boss...thanks again iatn...good job
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