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Prev Professional Automotive Repair Technical Discussions for January 22, 2007
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Open Help Requests for GM
Help Request Answers
1994 Cadillac Eldorado 4.6L Poor Idle Quality, Surge VIN: 1G6EL12Y9R
car starts up and idles rough and seems to run very rich and this symptom ocurs; the idle speed motor "ratchets/clicks" and tries to raise and lower the idle it moves in and out and the engine runs very rough if you hold the throttle open for a period of about...
1972 Chevrolet pickup 454CID engine
Hi everyone. I have a 72 Chevy 3/4 ton 2WD truck that originally came with a 350. I also have a 73 Chevy 3/4 ton 2WD truck that has a 454. I am trying to swap the 454 from the 73 into the 72 truck. But what I'm running into is that the engine doesnt clear the ...
1993 Chevrolet Lumina 3.1L MIL Lamp on VIN: 2G1WL54T9P
I hope I am not wasting anyones time with this, but I am not 100% certain of the reason for this problem. Car came in for check engine light on back on 7 Dec 2006. Scan showed multiple codes and the codes would not clear. Even with both battery cables disconne... Trouble codes: 46 (antitheft sys problem), 35 (iac), 43 (esc), 53 (sys voltage too high), 16 (batt voltage low or high), 25 (intake air temp hi plus a whole bunch of others)
1993 Chevrolet C1500 Cheyenne 5.7L Hyudralic System VIN: 1GCEC19H9P
Hi, guys! I have this Chevy truck in for brake line replacemnt. It had "brake light" on and pedal was very low. Looks like the previous shop had installed a brake line and master cylinder . The brake line was rubbing against the frame and had chaffed through...
1997 Chevrolet Blazer 4.3L transfer case VIN: 1GNDT13WXV
Vehicle came with no 4WD operation at all with the typical flashing lights when operation was attempted. I found the 4WD fuse blown and replaced it, cleared the codes and then the mysterious problem began. On the lift, when attempting to shift into 4 high from...
1999 Chevrolet C1500 Suburban 5.7L No Start VIN: 3GNEC16R4X
Customer called last weekend and said that his truck would not start. I told him I would be there the next morning. On my way to the shop he called and said that his truck was running. Yesterday he called, same problem. I got the truck towed here this morning,... Trouble codes: P1626 (VTD System), U1192 (testing and results)
1999 Chevrolet Silverado 1500 4.8L No Start VIN: 1GCEK19VOX
This truckis a no start. There is no spark and no rpm reading on scanner. I have no refference signal from computer to crank sensor. I have checked computer ground with scope for voltage drop . Only 180mv. With in specs. Before I replace computer is there anyt...
2002 Chevrolet Impala LS 3.8L Excessive Emissions, No Start, Poor Idle Quality, Stall VIN: 2G1WH55K32
Good day to all, this ones got me spun out, any help is appreciated, Complaint of hard start and stalling cold, appears to be flooding, once started will sometimes stall even with throttle open to 2000rpm, testing as follows: Performed Crankshaft relearn, Fuel...
2003 Chevrolet Suburban 1500 LT 5.3L steering VIN: 1GNFK16Z13
need help with one replace power pump with GM reman for hard steering in gear with foot on brake truning the wheel left are right. when drive on road fine.
1995 Geo Prizm LSi 1.8L Cuts out, Severe Jerk on Accel VIN: 1Y1SK5287S
Vehicle came in on wrecker, no start, college student, minimal funds. found secondary ignition intermittent spark, replaced wires, excessive resistance; distributor cap & rotor, excessive corrosion; ignition coil, because it lit me up while I was testing for c... Trouble codes: 31 (map)
2002 GMC Sierra 1500 SL 5.3L recirculation door VIN: 2GTEK19T62
Truck came in fogging up windshield intermittantly. Recirculation door is stuck on recirc. Recirc motor has power and ground but no ref voltage from the control head to switch it. If you power it up manually with 5 volts at the control head the door switches t...
2002 GMC Sierra 1500 SL 4.3L Misfire VIN: 1GTEC14W82
this vehicle came from a dealership from a sale in charlotte. do not have any information on the onwer or the vehicles history. the check engine light comes on and it has(po300) random misfires. you can watch the misfire data and it will count them off above i... Trouble codes: P0300
1998 Oldsmobile Regency 3.8L ebcm VIN: 1G3HC52K2W
Thanks for any help in advance. I installed an injector on this car to fix a miss on cyl #1. Two days later customer comes back because the abs and traction off lights come on intermitnly. I test drive the vehical and get the lights to come on. When the lights...
1993 Pontiac Bonneville SE 3.8L Cuts out, Stall VIN: 1G2HZ52K9Z
Hi guys Im having a real problem with this bonneville!It keeps coming in on the hook.The costumer said the car would stall and not start for them and as soon as it came into my shop it wouldnt stall and run completely great.It does have a vat system but the se...
1999 Pontiac Grand Prix SE 3.1L Stall VIN: 2FMN5SIOWT
i havev a 99 grand prix 3.1 liter customer states when coming off the highway will run rough and stall then drive ok. it has no codes do these tranys have problems with the tcc lock up solonied. thanks
2004 Pontiac Montana 3.4L park problem VIN: 1GMDX03E54
vehicle came in originally with wipers that would park straight up. It looked like someone had replaced the wiper motor recently and my tech figured it just needed to be re-timed. That fixed the problem for about a week and it was back. We replaced the wiper m...

Fixes & Summaries for GM
Fix/Summary Answers
1991 Buick LeSabre Custom 3.8L egr VIN: 1G4HP54C9M
1990 Chevrolet Beretta GTZ 2.3L timing chain VIN: 1G1LZ14A0L
Again, thankyou to all who took the time to help. I removed the timing cover again and this time found the tensioner assembly completely collapsed. The dowel that pressed in to hold the tension before you release it had wedged in the bore holding the shaft f...
1994 Chevrolet Camaro Z28 5.7L Starting VIN: 2G1FP32P6R
replace theft deterrent module thanks to glen [...] for your help
1994 Chevrolet S10 Blazer Tahoe 4.3L Cuts out VIN: 1GNDT13W1R
Thanks to all the techs that answered. I replaced the dist. with a reman,and drove it for a week without no stalling. Sent the old dist back to the rebuilder with a request to see what the trouble might be, had an answer that they couldn't find anything wrong....
1996 Chevrolet Express 2500 5.7L rear shoes VIN: 1GCFG25R8T
Hey guys, sofar customer is much happier how vehicle stops now. We ended up installing AC/DELCO-DURASTOP(their competive make brand) shoes & readjusted by backing off parking brake 1st. Special thanx to David, Kevin, Paul & James for info. they sent. Marvin if...
1999 Chevrolet Astro 4.3L No Start VIN: 1GNEL19W9X
ok, I did not have 12v at passlock module for the red/white wire. I replaced the passlock module (rt side of radio on astro) and performed the relearn. key to run, momentarily turn to start and relase to run for 10 min. turn off for 10 sec and repeat 2 more ti... Trouble codes: P1626, U1192.
1999 Chevrolet S10 LS 4.3L Starting VIN: 1GCCS19X5X
Thanks to all who replied in an attempt to help me fix this vehicle. Special thanks to Cameron [...] who suggested to use a file to trim the edge of the switch. Cameron also suggested if we were not installing the switch whi...
2003 GMC Sierra 1500 4.8L abs pump VIN: 1C34542V13
thanks allthat replyed long story. 2 mounths ago diag. abs module. custermer pulled fuse no fix. 1 mounth ago truck's drive shaft broke & broke tail on tranny. we repaired that. custmer 1 week later wonted abs repair so we did still had low speed abs turning o...
2003 Pontiac Grand Am GT 3.4L no start VIN: 1G2NW12E03
thanks for all the help on this hair puller. finally replaced ignition cylinder. voltage dropped to 2.63 . dealer had it stock so it must be a common problem.
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