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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 26, 2006
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Open Help Requests for GM
Help Request Answers
1983 Buick Riviera 5.0L lock-up VIN: 1G4E25H687
hi fellow tech's.i've got this 83 riv. first of all vin is wrong.question for you trans guys.this buick goes into lock-up when hot and won't release until it cools down. even with tcc connector dis-connected.i checked fix data base and see some sticking soleno...
1988 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP54C1J
Here it goes, The customer came in with a crank no start. We quickly determined the crank sensor failure fron damage. We inspected the balencer and found no reason for damage and wrote it off to road debris. Three days later the same problem occured. The senso...
1992 Buick Regal Custom 3.8L No Start, Stall VIN: 2G4WB54L3N
inherited this from customer after the parts were replaced customer states car will die and not restart i was able to duplicate once and had no spark no inj pulse during testing car started and has not acted up since any ideas would be helpful
1998 Buick Skylark Custom 3.1L MIL Lamp on VIN: 1G4NJS2M8W
On this buick we have a erls fuse under the hood that blows. on the fuse is electronic brake control relay and module. evap canister vent solniod and purge valve. a/c clutch relay. transmission range switch. power train control module. We have put a amp gauge ...
1996 Cadillac Eldorado 4.6L A/C compressor VIN: 1G6EL12Y6T
Cant get A/C compressor to engage.Clutch will engage when grounding A/C relay DK green/wht wire,ckt469 [PCM 26]with test lite.Pressures look OK Gets cold. With scanner hooked cant command clutch on, scanner says "A/C clutch cannot be commanded ON with dash con...
1996 Cadillac Seville SLS 4.6L Emergency brake VIN: 1G6KS52Y5T
I think I need a Caddy expert. Good friend of mine came in and said emergency brake does not hold when car is running only when car is off. Scaned ECM data saw no change in gear selection when moving gear shift I just read R_NDL even in park so I changed PNP n...
2000 Cadillac DeVille 4.6L No Start VIN: 1G6KD54Y6Y
we checked the car, we found no ground to pcm, we fixed the grounds to pcm, checked all powers/grouds ok, checked data buss line no problems found, cant talk to pcm, we can with all the other modules through the tech 11, we keep getting code u1000 no comunicat...
1993 Chevrolet C1500 Cheyenne 5.7L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 2GEC19H3P1
This is a good one. I was given this vehicle to repair after the tech who replaced the engine quit. The truck was running fine before, the customer wanted to a new engine before giving truck to son. Now on occasion, more often after vehicle has been sitting ov...
1993 Chevrolet C1500 Cheyenne 5.7L No Start VIN: 2GCFC19K7N
vehicle towed in for a no start. we replaced fuel pump after checking power to connector ok at the time ran for about 5 minutes and died no power to gray wire at pump can energize wire at relay can hear pump running. you can turn the key off and on and now and...
1994 Chevrolet Corvette 5.7L clutch VIN: 1G1YY22P5R
Removing engine on car and will not separate more than 1/2" from the transmission. ZF 6spd trans with LT1. Seems like something is stuck and wondering if anybody else has had this problem or ideas of what could be hanging up.
1997 Chevrolet Cavalier LS 2.4L MIL Lamp on VIN: 1G1JF52T2V
Customer states STS light comes on and shorthly after SES light comes on... We scanned it to find a PO442 fault - Pressurized system to check for leaks no leaks found, we can accuate system with scan tool (Modis) all is well cleared the code and it stayed off ... Trouble codes: P0442
1999 Chevrolet Astro 4.3L A/C operation VIN: 1GBEL19W5X
Hello fellow members. This van has a very intermittant short thats giving me a problem. If vent or heater settings are on all works great, but if any setting that requires the compressor to engage, #12 fuse blows. As far as i have got was to disconnect compres...
2000 Chevrolet Astro 4.3L Misfire VIN: 1GCDM19W8Y
Read above Trouble codes: P0300 (testing and results)
2000 Chevrolet Corvette 5.7L clutch set VIN: 1G1YY22G9Y
I am well into the job and was told I could use the rear spring tool and ball joint seporators from the local dealer.Now they say they dont have them??? I think I can deal with the spring problem but would like to know if anyone has any advice since this is my...
2001 Chevrolet Silverado 1500 5.3L Electronic VIN: 2GCEC19T61
Vehicle came in low miles brake light on dash stayes on wile driving. Checked brakes all the way around pads good no leakes master cylender full, parking brake workes when you aply the parking brake wile in gear the light flashes when you release it it stayes ...
2001 Chevrolet Suburban 1500 5.3L Unknown VIN: 3GNFK16T11
At 65 to 70 miles per hour, steering wheel shimmies/shakes slightly. Tires appears ok. Balanced all 4 tires. Vehicle not equipped with steering stabilizier.Front end appears tight. ANy help would be greatly appreciated..Thanks.
1996 Oldsmobile Aurora 4.0L compressor VIN: 1G3GR62C0T
Original concern- radiator leaking and compressor cycling fast. pressure tested the cooling system and found that the radiator tank was leaking. recovered freon, evac system, recharged with 2 lbs of r134a and added leak dye. ran the system and checked for a le...
1998 Oldsmobile Silhouette GS 3.4L MIL Lamp on VIN: 1GHDU03E5W
The van came back after 600 miles with new codes P0172 Fuel Trim rich and P0440 Evap Systems. I have checked most everything. Mode 6 on a Genisys says EGR Cruise fail and EGR Decel Fail. Checking the Digital EGR showed no problems either operating it with a sc... Trouble codes: P0172 (Fuel Trim Rich), P0440 (Evap Emission System)
1996 Saturn SL1 1.9L Excessive Emissions VIN: 1G8ZG5289T
this car came to me from another shop with all these parts installed.car is running rich all the time.all sensors look good on scanner,fuel pressure is at specs. there is no leak down from injectors.ive removed the pcv hose from intake and the o2 doesnt change... Trouble codes: 656 (fuel level sensor), 132 (high voltage on oxygen sensor)
2000 Saturn LS2 3.0L Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on, Lack of Power VIN: 1G8JW52R9Y
Hello all, I have a Saturn here I'm having some difficulty diagnosing. The customer stated that after replacing the battery, the vehicle bucks and runs rough. The vehicle does run extremely rough, has a noticeable misfire (engine light flashes), stalls occassi... Trouble codes: P0300 (random cylinder misfire), P0302 (cylinder 2 misfire), P0304 (cylinder 4 misfire), P0306 (cylinder 6 misfire), P0171 (fuel trim system lean bank 1), P0174 (fuel trim system lean bank 2)

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Regal 3.8L MIL Lamp on VIN: 2G4WB5218S
HI guys,thanks for the replies. Sorry for the late post, customer just brought car back last friday. Turned out to be a bad ign module. Dave, Brandon, Dusty and Bob nailed it. Moduule was not properly tightend to coil/module bracket and may not have been cooli... Trouble codes: 321 (intermittent cam signal), 341 (no 18x ign pulses), 361 (est not toggling).
1995 Buick Park Avenue 3.8L Intake VIN: 1G4CW52K3S
Thanks for all he help I recieved. What I did do was to replaced the upper and lower inatke manifolds. Though I am not too sure that the lower intake replacement was truly necc.For any one making this repair in the future be sure to replaced the plastic coolan...
1995 Cadillac Seville STS 4.6L MIL Lamp on VIN: 1G6KY5299S
HI,guys,well the caddy has been gone for 2 days and so far all is well,thanks to the 3 people for their time & input and to rick for his extra time of forwarding a past fix so it all goes back to the kiss principle (keep it simple stupid) the whole problem was... Trouble codes: P0080.
1993 Chevrolet Lumina APV 3.8L Excessive Emissions, Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 1GNDU06L3P
Thanks for all who offered to help. The key to the fix was the cam sensor pattern not grounding completely. cam sensor wiring harness insulation was frayed and oxidation created extra resistance. Possibly from rubbing on the engine block or alternator bracket.... Trouble codes: 23 (MAT- Manifold Air Temperature sensor), 99 (Power management problem), 66 (A/C switch).
1997 Chevrolet Venture 3.4L power windows/blower motor VIN: 1GNDX06E4V
thanks to everyone that applied. it ended up being the ignition switch. soon as i told the customer it might be the switch i got the rest of the story as usual. he had said that this was a recurring problem that when he would turn vehicle off, it would work ag...
1998 Chevrolet C1500 Suburban 5.7L Misfire VIN: 1GKEC16R7W
well we have rechecked everything possible. the leak down test didn't show us anything and we decarboned the valves real good with no results. we think that we do have a valve problem but the customer doesn't have the money to keep going. he will be bringing i... Trouble codes: P0300, P0306.
1999 Chevrolet S10 LS 4.3L MIL Lamp on VIN: 1GCCS19X5X
When this vehicle returned to the shop we removed all codes and it has not returned to us as of this date. Thank all of you for your response and suggestions.
2000 Chevrolet Silverado 1500 4.3L No Start VIN: 1GCEC14V6Y
I found the hall effect sensor in steering coloumn defective, thanks to all members for the advice. I found post repair on this from the tech mail , Saturday I got the lock case and put it on. Then the key tumbler was jamming up. I am no locksmith so out of de... Trouble codes: B2960.
2000 Chevrolet Impala LS 3.8L transaxle VIN: 2G1WH55K3Y
Congratulation to all technicians who point out at the wheel bearing. I took all of the technicians advice who told me to listen to the wheel bearing and feel the spring while turning the wheel. I would like to thanks the rest of the technicians for their advi...
2002 Chevrolet Impala 3.4L Hesitation VIN: 2G1WF55E32
Well after everybody told me to check the cat they were right. It was plugged, but I had to remove it to find that. In the past I have drilled a hole and helped the running of the vehicle but this time that did not work, I unhooked the exhaust all together and...
2003 Chevrolet Silverado 3500 6.6L Seal VIN: 1GBJC34123
Thanks to all who replied. Most of you said to look at the fuel injectors. I took Alan's advice and called the dealer. This vehicle is covered by a 10 year 200k warranty. Again thanks for all the replies.
1992 Oldsmobile 88 Royale 3.8L No Start VIN: 1G3HN5316N
Well another bonner one is done. Advice: Don't trust used parts, even though it came from a friend that said it was ok. Got a new ignition module from parts supplier today. 'FIXED' Now I have to spend a couple more hours putting everything back together under ...
1997 Oldsmobile Bravada 4.3L No Start VIN: 1GHDT13W6V
Hi all thanks for the help. I replaced the spectra preimeum pump with an airtex pump. Feed line conectorwas installed with sweaged conector not glued. I also replaced the fuel pressure regulator and filter. I also checked the lines for restrictions and found n...
1999 Oldsmobile Alero GL 2.4L Stall VIN: 1G3NL12T3X
sorry for the delayed close customer will bring back when stalling returns.per customer last time vehicle stalled was back in march and hadnt stalled until that saturday.thanks again to all.
1996 Pontiac Sunfire SE 2.2L theft detected
thanks for all the help i reprogramed the sunfire and problem solved it has been gone about a week so far so good thanks
1999 Pontiac Sunfire SE 2.2L charging system VIN: 1G2JB5249X
customer came back vechile not charging again no 5 volt ref to l terminal of the 2 pin connectortriing to find relay to the starting system from the battery feed thanks for all the replies
1999 Pontiac Bonneville SE 3.8L Runs Good! VIN: 1G2HX52K6X
Hello Friends, First, I want to say thanks to all who replied, I read all the posts and they gave me some food for thought. Also, I fixed the car within a few days of my Techmail help request but we have been overwhelmed here at the shop and there has been l...
2000 Pontiac Grand Prix GTP 3.8L Compressor VIN: 1G2WR5213Y
Sorry for the delay. Customer gone for several weeks. We installed a control head as most suggested and it is fixed. No thorough diagnostic information given, just put a control head in it and it will fix it because it is very common.
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