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Prev Professional Automotive Repair Technical Discussions for July 21, 2006
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Open Help Requests for GM
Help Request Answers
1993 Buick Regal Custom 3.1L Misfire VIN: 2G4WB14TXP
Techs, This Regal 3.1 . Has a Popping noise in the exhaust on decel. Can't duplicate it on the road . In the Bay, hold it at 3000 rpm and let off. On the way down to idle, she will make a loud POP in the exhaust manifold (NOT the muffler) , and shake the engi...
1995 Buick Riviera 3.8L battery VIN: 1G4GD221XS
Hello All, Have a 95 Riv with an intermmitent draw. Could happen one day or three days apart. Longest time so far is 3.5 weeks. I've swapped all relays one at a time and eliminated circuits one at a time by removing fuses. Now it's been two weeks and it happ...
1999 Cadillac DeVille 4.6L remote opener VIN: 1G6KD54Y4X
I need help programming a new remote door unlocker. The customer purchased it from the Caddillac dealer and was told they would program it but they are 100 plus miles away so he asked me if I would do it for him
2002 Cadillac DeVille 4.6L Poor Idle Quality VIN: 1G6KD54Y92
This Cadillac has a very high idle (1700 rpms) all the time changed IAC and smoke tested for vacuum leaks (none found) apply gas will stay at 3000 RPMS (cables are all free)
2002 Cadillac Seville SLS 4.6L tcc VIN: 1G6KS54Y12
Hi, I'm looking for someone to help with a simpler way to test for operiation of PWM Seolnoid, I know these are pron to converter failures, but with only 45000 miles? Long story short, sets code p1860 on second trip, eventially will set po741, while comanding ...
2002 Cadillac Escalade 6.0L Steering VIN: 1GYEK63N82
This vehicle belongs to a customer who coplained of a noise when making sharp turns the steering makes a grinding noise like something rubbing but have searched and cannot find any rubbing was wondering if anyone has had this problem .
1995 Chevrolet Blazer 4.3L abs module VIN: 1GNDT13W3S
so i have this blazer that came in with there own parts wanting the brake booster replaced because of hard brake pedal so since he diag his own problem we installed his part but guess what that did not fix hard pedal so after looking over the truck found that ...
1997 Chevrolet Lumina 3.1L Hesitation VIN: 2G1WL52M6V
car came in with hesitation concern. test drove felt like was running out of fuel. test drove with scan tool and o2 sensors disagreed with this theroy. o2 stayed high around 700mv but did fluctuate down to about 200 mv. fuel trim at idle is about -20 long term...
1997 Chevrolet Venture 3.4L power windows/blower motor VIN: 1GNDX06E4V
this customer came in and has problems with the power windows and blower motor. he was driving along and went to roll the window down and the blower stopped and the window didnt move. couple of minutes later blower kicked back in. tried the window again and it...
1998 Chevrolet C1500 Suburban 5.7L Misfire VIN: 1GKEC16R7W
1998 Chevrolet Blazer 4.3L front suspension VIN: 1GNDT13WXW
Hey guys, I have looked through similar posts and have tried following the suggestions therein. I am at my wits end. We actually have 2 of these cars here with identical noises. We did ball joints on both of these Blazers on all 4 points, using Moog "problem s...
1998 Chevrolet Cavalier 2.2L cooling fan VIN: IGIJC5247W
This customer said he wanted me to replace the fan motor and the connector. I replaced both and the fan did not run. After checking things out I saw that there was no Relay, easy fix I thought. Put in new relay and fan stil didnt run. Jumped relay and the fan ...
1999 Chevrolet Silverado 1500 5.3L Cuts out VIN: 1GCEK19T6X
this truck came from auction,cold start idles good go to take off and it falls on it's face for about 2-3 blocks then takes off, someone has put a used throttle body on, has a new delco fuel pump assembly, coolant tenp sensor is reading poropper temp, seem to ...
2002 Chevrolet Silverado 1500 4.3L No Start VIN: 1GCEC14W12
Hi,i have a strange problem with this 2002 Chevy 2WD pickup and that is the Distributor gear.At 122,000 miles,this truck was towed in with a no start condition.I scanned for codes and it had a code P1345 for cam/crank mismatch.Upon inspection and testing,i dis... Trouble codes: P1345 (Cam/Crank Mismatch)
1996 GMC C1500 Sierra SL 5.0L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GTEC14M3T
Hey techs, I have a 1996 gmc c1500 p/u that idles rough and has almost no accel until nearly full throttle. I have read the numerous other posts but still had a few questions. I have replaced the b2s2 o2 sensor. Short term fuel trim is 89 bank 1 and 192 bank 2...
1999 Oldsmobile Alero GL 2.4L 1-2shift VIN: 1G3NL52TOX
Vehicle came in with no CEL on. Code PO122 was history code only. Customer stated that TCS light came on and went off. Trans. then "banged" in Rev. or Dr. When car was presented for diag./repair the only thing that showed up was a harsh shift from first to se...
2000 Oldsmobile Alero GL 3.4L No Start VIN: 1G3NF12E51
Car came to me with no start situation. Customer said another shop had replaced the PCM and ignition switch, and did not know what else they had done. Car has fuel pressure and spark, cranks good, but will only fire once or twice then quits firing. I replaced ...
1997 Pontiac Grand Prix GT 3.8L 2-3 shift VIN: 1G2WP52K1V
Please help, have spent way to much time on this one. First off the car died on road with a bad alternator. Towed car in R/R alternator and charged battery. Car has had a very random problem,first thing in the morning the car will shift 1-2 fine but the 2-3 sh...
2006 Saturn VUE 3.5L Propeller shaft VIN: 5GZCZ63426
My Girlfriend's vehicle makes a rattle at varying speeds. Sounds like a possible loose shield. It occasionally shudders rather badly and it acts as if your driving a manual trans and not engaging the clutch enough but happens at speeds of 20 to 35 mph. The Vue...

Fixes & Summaries for GM
Fix/Summary Answers
1991 Buick Park Avenue 3.8L Stall VIN: 1G4CW53L6M
I think this one is fixed. I replaced the crank sensor & repaired a bare wire in the harness under the alternator. Drove the car 50 miles with no problem but the one time immediately after the repairs(?) Customer decided to take car & has been driving for a we... Trouble codes: 17 (spark reference circuit).
2000 Cadillac DeVille 4.6L battery no charge VIN: 1G6KD54Y5Y
thanks paul for the email tsb info. looks as if i may have overstated the problem turns out 11.9 is normall systems working perfectly now no lights on drove it 2 days 200 miles no problems? thanks for the help
1994 Chevrolet S10 Blazer Tahoe 4.3L Hard Cold Start VIN: 1GNDT13W7R
thanks for the help the members offerd me on this problem, i replaced the fuel pump, and the problem was solved. However, i also replaced the intake manifold gasket due to a water condition in the oil. The engine ran great, then i gave it a WOT under load. t...
1995 Chevrolet Cavalier 2.2L MIL Lamp on VIN: 1G1JC1248S
First of all, sorry it took so long to respond, Ive had a death in the family and have been very busy. Now about the cavaleer, When I went to the fix archives, lots of people responded with 'You should disconnect the devices driven by the quad driver one at a ... Trouble codes: 27 (quad driver b fault).
1998 Chevrolet Corvette 5.7L Valvetrain VIN: 1G1YY22G1W
Thank you to all that responded. I learned rev limiter is not 100% foolproof. The cust picked up vehicle to have a friend R+R heads. I will have a look when he calls me. I also will check lifter for damage as suggested. Plus, I will check valve guides for stic...
2004 Chevrolet SSR 5.3L Driveshaft VIN: 1GCES14PX4
Thanks for the suggestions everyone. The customer has not decided what he wants to do next. Some of the suggestions made reference to a procedure GM used in the 80's involving drilling a hole in each end and filling the driveshaft with expanding foam, but du...
2005 Chevrolet Cobalt LS 2.2L key,lock cylinder,shifter VIN: 1G1AL52F95
thanx for the opinions.we got the shifter in.this is the problem.after removing the old shifter,i could see the pin was fallen out that goes through the plastic detent cable that runs in the middle of the tube.did'nt need to get the lock cylinder.
1985 GMC C1500 5.0L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 1GETC14H4F
This one is fixed and out the door. It ended up being vacuum lines switched. Mainly the hose from the vapor canister and the PCV line. I ended up removing the wire loom from the vapor canister lines and individually tracing them. I appreciate the help. IATN pr...
1998 Hummer H1 6.5L MIL Lamp on VIN: 137ZA9035W
Well after looking a little closer at a hard to get wiring diagram I located the fuel pump relay which is mounted on the firewall opened it up and cleaned the points resealed the cover and all is well the secondary fuel pump is now running and the pesky MIL li...
1997 Saturn SL2 1.9L cruise control VIN: 1G8ZK5276V
With four out of four replies pointing to the module I put a module in it . Drove about thirty miles with rock solid cruise. Thanks guys!
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