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Prev Professional Automotive Repair Technical Discussions for September 29, 2004
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Open Help Requests for GM
Help Request Answers
1994 Cadillac DeVille Concours 4.6L Poor Idle Quality VIN: 1G6KF52Y2R
this vehicle as soon as it gets hot (95 CĒ) at idle in park or in drive will rise and lower the rpms. It will do it for a short period of time (4 or 5 up and downs) and then it will be stable. While this is happening we can see the ISC moving back and forth. I...
1955 Chevrolet 210 265CID old
looking for front end spect. wheel base width+lenght.caster +camber.frame points for ck.sq.for.[...].210.
1991 Chevrolet G30 Beauville 5.7L Unknown VIN: 2GAGG39K1M
These big vans are not my usual line of work (being an import specialist), but---thought a brake problem would be simple enough. Maybe the GM techs can help me out of this one! This van came in pulling hard to the left during a high speed braking situation and...
1996 Chevrolet Blazer 4.3L lacks power VIN: 1GNDT13W2T
It idles good but has no power when you try to drive it.It acts like the timing is late.When i installed the trans there was a noise coming from the front of the motor like a rattling .Noise was present with t-converter unbolted.this was with about 15,000 afte...
1996 Chevrolet Lumina LS 3.1L Poor Idle Quality, Surge, Stall VIN: 2G1WN52M6T
this is a hot soak problem. after a twenty min. period try to start car will stall then if you restart it will start but surges for a little then smooths out and runs great. fuel pressure hold for twenty-five minutes before bleeding down. iac reads 8 counts at...
1999 Chevrolet Cavalier 2.2L Hesitation VIN: 3G1JC5241W
This car came in two days ago with those codes, and having an electronic solenoid operated EGR valve, I replaced it and things seemed fine. It's back two days later with the same codes, and hesitating like it did before. I did use a Wells EGR valve as it cost ... Trouble codes: 404 (EGR range problem), 1404 (EGR Not fully closed)
2000 Chevrolet Silverado 1500 5.3L No Start VIN: 2GCEK19TXY
Thanks in advance for whatever advice I can get. The engine will start momentarily in crank position. When the key goes back to run the engine stalls everytime. I checked and replaced the ignition switch. I can run the car with starting fluid through the thro...
1995 GMC Sonoma SL 4.3L MIL Lamp on VIN: 56S8512738
This truck came to me with the mil on and the three codes mentioned. When I clear the codes it can take as much as 500 miles for the mil to come back on. The owner has no drivabillity complaints. Yesterday I peeled the insulation back from the main wire harnes... Trouble codes: P0141 (O2 heater circuit problem), P0401 (Insuficient EGR flow detected), P1442 (Evap switch high)
1995 Oldsmobile Aurora 4.0L Engine surging, temp VIN: 1G3GR62C0S
Customer brought vehicle in with complaint of engine overheating and engine dying only when engine overheats. I noticed "Check engine" light didn't come with key on engine off. Inspected coolant level good. Ran engine at idle until engine started to run hot. N... Trouble codes: 80 (Fuel system rich), 121 (A/C high side temp sensor problem), 73 (Intermittent cooalnt temp failure)
1994 Pontiac Firebird Formula 5.7L crank pulley VIN: 2G2FV22P1R
This is an LT-1 engine. We are trying to replace the front crank seal. When we bent a MAC puller trying to remove the hub from the end of the crank shaft and it still had not moved the tech decided to stop before something else got bent or broken. Has anyone e...
2001 Saturn SL2 1.9L No Start VIN: 1G8ZK52751
hi, this saturn is an intermittant no start. when it doesnt start, there is a U1300 code. the archives come up empty. its some kind of data link short . i looked at a wiring diagram and it goes from the pcm, thru the dash, thru a "sensing and diganostic modu... Trouble codes: U1300

Fixes & Summaries for GM
Fix/Summary Answers
1985 Chevrolet Corvette 5.7L clutch VIN: 1G1YY0782F
Thanks to everyone who responded. I got some pretty good Ideas, most of which I had already tried. Deke [...]. hit it on the head. It turns out that the original throw out bearing was installed on the fork, between the retaining spring and the fork. This allowed t...
1992 Chevrolet K2500 Suburban Silverado 7.4L Excessive Emissions, Poor Idle Quality, Cuts out, Poor Fuel Economy VIN: 1GNGK26N7N
Thanks to all who responded we checked everything on this truck and the cust had pretty much replaced everything except the drivetrain. We finally gave it back to him and he went to trade it in on a new truck but it didnt even make it that far. He decided to...
1996 Chevrolet Corsica 3.1L MIL Lamp on, comes back on VIN: 1G1LD55M4T
I have waited a while to make sure that the engine light would not come back on and so far it hasn't. it turns out to be that it did needed the pcm to be updated. I would like to thank everyone for there input. Thanks. Trouble codes: P0401 (EGR flow).
1998 Chevrolet C3500 Cheyenne 6.5L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, MIL Lamp on, HARD START OVERNIGHT VIN: 1GBKC34F7W
September 29th, after finding initial codes,I called and talked to customer about it all and we decided to put in a new crank sensor as it was in current and history codes but not failing at the time we had it. called him today and he says he has not had any p... Trouble codes: P335, P251, P335, P238, P251, P335.
1998 Chevrolet K1500 Suburban 5.7L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 3GKFK16R4W
Thank you for all of your assistance the customer finally brought this vehicle back for repair and I went with my gut and replaced the pcm. After reprograming and relearning the igntion key sequence the vehicle seems to run perfectly. The customer has had the ... Trouble codes: P0300, P0171.
1999 Chevrolet Venture LS 3.4L Supplemental Inflatable Restraints VIN: 1GNDX03E2X
I received 4 replies to my post and all stated that the seatbelt pretensioner was bad. Bob from Ontario told me to get a 2 ohm 1/4 watt resistor and place it on te terminals of the connector that you would hook-up the special tool (J-38715-A)too and re-check y...
2000 Chevrolet C3500 5.7L 4th gear VIN: 1GBJC34R5Y
Thanks to those that responded yes it was the 4th gear acummulator causing the problem when we pulled the valve body back down the spring was broken in two. The tech said it was not that way the first time he looked at it. So I don't know if it was about to br...
1999 GMC Yukon Denali SLE 5.7L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GKEK13R5X
thanks for all replys. the fix turned out to be intake manifold gasket.leak was not visible but removed valve cover and injected manifold full of smoke and found leak at bottom of #6 intake port. Trouble codes: P0306.
1999 GMC K3500 Sierra SLT 7.4L Excessive Emissions, No Start, Poor Idle Quality, MIL Lamp on VIN: 1GTHK34J7X
some days better than others- after rechecking everything found that at times the fuel pressure would drop some- removed upper intake to find (rebuilt gm injectors from linder) injector dripping fuel- replaced all injectors with bosch units- no more mis... Trouble codes: P0125, P0141, P0161.
2000 GMC Safari SL 4.3L Cuts out, Stall VIN: 1GTDM19WXY
This Safari is fixed! Many thanks to James from Texas and all the great info. on programming that is located in the web forums from Lance Mossman and Martin [...]. I asked the shop that had this vehicle to replace any modules that had been fried due to the lig... Trouble codes: P0102.
1990 Oldsmobile 98 Regency Brougham 3.8L Misfire VIN: 1G3CW54C0L
Once again this marvelous network comes through in the clinch. all of the suggestions were excellent and they did lead me to the right conculsion. some of the suggestions were as follows. plug wires, injectors, cam sensor, when I unplugged the cam sensor, it m...
1995 Pontiac Grand Prix SE 3.1L security VIN: 1G2WJ52MOS
you guys were right the white wires to lock cylinder were broken.New lock cylinder and keys and light no longer flashes. Thanks again.
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