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Prev Professional Automotive Repair Technical Discussions for October 6, 2010
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Open Help Requests for GM
Help Request Answers
1997 Cadillac Seville SLS 4.6L rack & pinion VIN: 1G6KS52Y5V
hello all. car has normal steering to the left but turning to the right it looses assist at 2 spots exactly 1 steering wheel revolution apart in other words at the same pinion tooth. leaning towards replacing the rack assembly but would like more suggestions c...
1993 Chevrolet K1500 Suburban 5.7L high idle VIN: 1GNEK18K1P
Hello fellow techs I have a vehicle here that I am spinning my wheels on it as been to 3 other shops and is on its second visit to our shop. The vehicle has an intermittent high idle after running for a while. If I'm getting the story straight from my service ... Trouble codes: 43 (ESC knock sensor system intermittent)
1995 Chevrolet G30 Chevy Van 7.4L Hesitation, Stall, MIL Lamp on VIN: 1GDHG39N1S
Vehicle runs rough and kills. Checked and replaced fuel pump and still have low fuel pressure. Pinch off fuel return line and pressure jumps up, van then runs great. Have been working with Identifx and have narrowed this down to fuel pressure regulator. Gm p/n... Trouble codes: 33 (map sensor)
1998 Chevrolet Cavalier 2.2L Poor Idle Quality, Hesitation, Cuts out, Stall, MIL Lamp on VIN: G1JC5246W7
Hey guys I have a car that i just cant figure out. Car was dead on the road would start but would die if you gave it gas. This morning i come into the shop and it fires up fine runs fine had a code for p0107 map sensor low circut. I tested the connector to the... Trouble codes: P0107
1998 Chevrolet K2500 Suburban 7.4L compressor VIN: 1GNGK26J3W
First customer complaint was intermittent a/c inop. but also not really cold. Road tested and found temp reading out of front vent staying around 48-52 degrees. And found front air temp would go down to the low 40's when running both front and rear a/c. Turn r...
2001 Chevrolet Silverado 1500 4.3L Misfire, MIL Lamp on VIN: 1GCEC149W1
Guys this one is driving me nuts. I have good fuel presure I think. My guage is bad but reads about 50lbs at idle, I know its supposed to be 60 but thats not that short. I have smoke tested this thing for vacuum leaks and didnt find any. I have a missfire on c... Trouble codes: P0171 (Lean Bank One), P0174 (Lean Bank Two), P0300 (testing and results)
2002 Chevrolet Suburban 2500 LT 8.1L No Start VIN: 3GNGC26G82
had truck in in 8/2010 for bad crank sensor had code ran fine 2 months 6500 miles . went to go out for drive no start no fuel pressure, found ecmb fuse blown called for 20 found 25 in its place ran amp draw on line most it drew was 15 amps put 25 back in ran g...
2003 Chevrolet Silverado 2500 HD 6.0L Stall, Misfire, MIL Lamp on VIN: 1GCHK23U43
Intermittent stall. Have been unable to duplicate customer complaint at various speeds, decel, loads, etc. O2 sensor is indeed very lazy, only occasionally will it vary from 450mV, even with butane enrichment or simulating lean condition. Fuel regulator not le... Trouble codes: P0134 (Low O2S activity bank 1 sensor 1), P0300 (Engine Misfire Detected), P1516 (Electronic Throttle Mod Vs. Throttle Position Performance)
2003 Chevrolet Impala 3.4L front end VIN: 2G1WF52E53
This vehicle came in with a squeak in the front, only on acceleration, only when turning right. The front hubs had some play in them so both were replaced. Still had the squeak. Car has to be rolling and noise sounds like a metal to metal click. The rhythm of ...
1992 GMC C3500 Sierra 6.2L Hesitation, Stall VIN: 1GTHC34J7N
Thanks in Advance for all your help. I am working on a 1992 C3500 with the 6.2 Diesel. Mechanical Injection Pump. What the truck is doing on a cold start it will start and idle fine, when giving it the throttle at idle it will blow excessive white and blue smo...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Century Custom 3.1L MIL Lamp on VIN: 2G4WS52J5Y
Thank you everyone for all the great ideas. We ended up isolating the filler neck, because it wasn't showing we had a leak with it connected. We disconnected it and applied smoke to it and found a tiny pin hole near the top. Why it wouldn't show a leak is beyo... Trouble codes: P0442.
2002 Buick Rendezvous CX 3.4L differential VIN: 3G5DB03E82
The problem was rear differential clutch check valve thanks for the help;
2001 Cadillac DeVille 4.6L Steering VIN: 1G6KD54481
the problem was that i was using a reman delco pump and i ordered an a1 cardone, put it on an it works just fine i used 3 delco pumps right out of the box and they all were bad so i know not to [...] that again thanks for all the help
1997 Chevrolet P30 7.4L Excessive Emissions VIN: 1GBLP37J4V
I have learned two good lessons today. 1st, if you want the right info go get it yourself, I was relaying info and tests to run to my mech. 2nd lesson, dont keep starring at the scanner and remember your basics. Performed compression test and found #3 and 5... Trouble codes: P0121.
1998 Chevrolet S10 LS 2.2L Stalls VIN: 1GCCS1944W
Ignition Switch!?!?!?! After One of you fine gentleman suggested it was my ignition switch I Took a closer look at my engine compartment fuse box. And wouldn't you know I had a row of 4 fuses that read the same voltage as my volt gauge. The fuses were Headligh...
2000 Chevrolet Silverado 1500 LS 5.3L No Start, Cuts out VIN: T0Y1338322
Thanks to all that replied ,I was pretty sure that my diagnosis was correct but I stopped working on most autos due to back and having heart problems as well put a new pump in and just hit the 200 mile mark on new pump and filter seen a lot of stuff on removin...
2000 Chevrolet Cavalier 2.2L Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 3G1JC1245Y
Found a badly corroded connector underneath the battery tray. Spliced in new connector and problem solved. Trouble codes: P0122 (Low TPS).
2001 Chevrolet Silverado 2500 HD 6.0L air bag VIN: 1GCHK24U91
first off thanx for your replies. when posting i wrote the wrong pin on the dlc. i was checking pin 2 must have had a brain fart. i removed seat, carpet and kick panel found no problems with wiringpulled apart the class 2 data juction block and found no proble...
2001 Chevrolet Silverado 1500 4.8L transfercase VIN: 2GCEK19V11
i clean the a/b motor therminal and its run good but the problem are now intermitant (1 time in 2 week)but the customer dont want repare (key on /off and restart to shift
2003 Chevrolet S10 2.2L Evap VIN: 1GCCS14H53
thanks to all for the help. the a/c pressure switch seems to have fixed it. this vehicle came in with evap and suction hose freezing up and blocking air flow. we checked all the basics and could not find a cause. diagnostics lead us to a faulty control valve i...
2004 Chevrolet Optra LS 2.0L MIL Lamp on VIN: KL1JK52Z64
Hello All Thanx to everyone for your help.I am stating that the vehicle is repaired as the complaint has not re-appeared since replacing the PCM and running a crankshaft variance relearn.The previous PCM would not run the relearn and continued to set a P0300 ... Trouble codes: P0300 (random missfire detected).
2003 GMC Yukon XL 1500 SLT 5.3L door locks
Thanks again everyone for all the great replys to my very first techhelp post. I took everyones advice. Checked all the grounds, checked for any wires being shorted or pinched in the door jams and the current through the relays. Everything looked great and now...
1995 Oldsmobile Cutlass Ciera 3.1L No Start VIN: 1G3AJ55M0S
well we haven't fixed it yet but have learned and have not given up yet. we found that it had no vacum because the customer installed the incorrect intake gasket. we have installed both cranl sensors, cam sensor, and new module, all a/c delco still no change....
1969 Pontiac Firebird 350 5.7L camshaft
Thank you to all that replied,I assumed this was a normal condition so that the lifter rotate as many of you stated.Its been a while since if been on the inside of a flat tappet motor wasnt sure but am now.Thanks again to all.What a great orginazation to be a ...
2000 Pontiac Firebird Trans Am 5.7L Wipers VIN: 2G2FV22G6Y
Ended up being the electrical connection at the wiper motor. When opened up I unplugged connection, inspected, reconnected and since then has worked fine. Strange but true.
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