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Prev Professional Automotive Repair Technical Discussions for November 16, 2010
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Open Help Requests for GM
Help Request Answers
1997 Buick LeSabre Custom 3.8L high idle VIN: 1G4HP52X1V
Thanks in advance for all your replies. This one has me stumped, intermittent but occurs 80 to 90 % of the time. When you start the car tps voltage is about .56v but the angle climbs to 1 to 2% and when this happens the idle goes up to about 1450rpm desired is... Trouble codes: P0507
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2004 Buick Rainier CXL 5.3L MIL Lamp on VIN: 5GAET13P54
The vehicle has had a recuring p0420 code and now has a pending p0174 lean condition b2. I have checked the fuel pressure and volume , pressure under heavy accel. Checked the regulator, smoked the intake all ok. I checked and cleaned the maf, but was ok. The f... Trouble codes: P0420, P0174 (Lean condition b2)
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1995 Chevrolet K2500 Cheyenne 5.0L brakes VIN: 1GECK10823
vehicle came in with a low brake pedal but no leak. front brakes were almost grinding so i figured do those and try bleeding first, no fix. replaced rear shoes as they were low and way out of adjustment, no fix. replaced master cylinder, wheel cylinders and fr...
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1997 Chevrolet Camaro Z28 5.7L MIL Lamp on VIN: 2G1FP22PXV
Hi techs, i keep getting p0400 egr system.if i put vacuum to the egr the diaphram move but when the engine is running it is like the diaphragm have a leak.i check the the solenoid and vacuum line,ok.i even use bicontrol on the scanner with my vacuum gauge and ... Trouble codes: P0400 (Egr system), P0507
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1999 Chevrolet K1500 LS 5.0L driveline VIN: 1GCEK19V5X
this truck has a loud ,heavy snapping sound in the driveline when power braking in 4x4 and you let the tires start to turn in all modes.sound is in the transfer case area but what could do this.its the electric auto transfer.i took it apart and dont see anythi...
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2001 Chevrolet Silverado 3500 LS 8.1L 3-4 shift, shift indicator VIN: 1GCJK39G91
Hello members. This is my own vehicle and ran into a problem on my way home. Stopped to pick someone up. Shut vehicle off, all was normal. When i restarted, Park indicator wasnt highlighted. Reverse highlights, 1st highlights, and 3rd highlights but 2nd, Park,...
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2001 Chevrolet Silverado 1500 HD LT 6.0L 4x4 shifting VIN: 1GCGK13U41
Hello fellow techs. I have this 01 Chev thats has got me going in circles. Customer came in with no 4x4 operation/noise from transfer case along with service 4wd light on. Found that the transfer case motor was not engaging and replace encoder/transfer case mo...
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2003 Chevrolet Trailblazer LS 4.2L Poor Idle Quality, Hesitation, Stall VIN: 1GNES16S53
Vehicle came in today with complaint of intermittant hesitation and stall. On tip in throttle, vehicle will loose RPM and sometimes stall. Almost feels like old GM EGR opening too soon. Tested fuel pressure, 56 psi all the time even when happening. Volume look...
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2004 Chevrolet Tahoe Z71 5.3L front differential VIN: 1GNEK13T64
Ok so here it is. 04 Tahoe z71 373 gears in the front diff. So ive tested the 4wd actuator and found that it wasnt doing its job. So replaced the actuator and still no 4wd. I do have communicaton with the transfercase and body control module. When I engage 4hi...
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1997 Geo Metro 1.0L Stall, Power loss VIN: 2C1MR2263V
The Metro that keeps returning and should have been a clunker cash car but keeps delivering economy, when it runs. Customer states at times it runs perfectly on his 75 mile commute, other times hesitates and looses power at random times. Checked fuel pressure ...
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2003 GMC Envoy XL SLT 4.2L ABS speed sensor VIN: 1GKET16S13
RF wheel speed sensor replaced. Still continues to lose signal off and on during road test. DTC set C0221, C0222. Cleaned ground lug to EBCM and checked connections. Also cleaned mounting surface at sensor to hub. Alldata suggests bad EBCM. Do not want to buy ...
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2007 GMC Savana 3500 LT 6.0L Pinion Bearing VIN: 1GDHG31U87
i have this gmc in the shop i need to replace the pinion bearing in the rear it has a locking type rear i have never did one of these, when i pull the axles out will the spider gears fall out are they under presssure i have done the regulars rear in these truc...
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2007 Other GM W42 6.0L abs VIN: 5B4KPD2U07
I have this 2007 Workhorse W42 with a Morgan Olson Body bread truck. The ABS light came on this morning and has not went off. This is a good customer of ours and I "thought" we could talk to the abs with the Tech 2 as we have with the eninge and transmission b...
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2004 Pontiac Grand Prix GTP 3.8L Misfire VIN: 2G2WR52454
One for you Good Wrenches. Got this 04 Grand Prix with the 3.8 turbo. It keeps cracking the #3 spark plug.(using OEM plugs) It will crack it within 10 minutes of replacement, usually on hard acceleration. It has cracked 3 plugs in succession. Did compression t...
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Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick Century Custom 3.1L High speed fan inop VIN: 2G4WS5M3V1
THANKS FOR ALL THE HELP IT DID END UP BEING A BROKEN WIRE DARK BLUE WHERE HARNESS RAPS AROUND BATTERY. WISH ALLDATA WOULD SAY TO GROUND THE WIRES AS PART OF TESTING. THIS PUT ME ON THE RIGHT TRACK THANKS TO ALL THAT REPLIED WAS A GREAT HELP. Trouble codes: P1652 (Cooler fan 2).
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1998 Cadillac DeVille 4.6L Overheating VIN: 1G6KD54Y8W
Well first Thank you to all who replied. I explained to the customer that even though I could not prove it 100% he needed head gaskets. He does not want to spend that money so he took the car home for now. It is good to have IATN professionals to help and conf...
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1997 Chevrolet K2500 Cheyenne 5.7L abs module VIN: 1GCGK24R0V
Hey guys, Well problem solved. I figured out that the brake pedal was great when the vehicle was not running (no vacuum assist). I started out eliminating (dead heading) each brake line out of the abs unit and found that the pedal would not drop when either...
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1999 Chevrolet Tahoe LT 5.7L timing cover VIN: 1GNEC13R6X
Thanks for the input, the rubber grommets around the bolts where failing. They would crumble if touched. Had svc writer check the parts that we used,not OE was a dorman. Uknown at this point is cust was using any oil additive, but it was not synthetic oil.
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1999 Chevrolet Blazer LT 4.3L Blinkers VIN: 1GNDT13WXX
found bad grounds. cleaned and retested. all is good thanks to all
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2004 Chevrolet Aveo 1.6L trans shifting erratic VIN: KL1JT52674
this one is fixed it was the speed sensor exatly how it sends 2 different signals i still dont know but that doesnt matter.a vss installed and it all works great...thanks for all the good replies.
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2004 Chevrolet Trailblazer EXT LT 5.3L Poor Fuel Economy, MIL Lamp on VIN: 1GNET16P34
Ended up just being a bad new 02 sensor on B1 S1 thanks for the help (been a bad month for bad parts) Trouble codes: P0133 (02 signal low b1s1), P1133 (Ho2s b1s1 insufficent switching), P1134 (Ho2s b1s1 transition timefault), P1153 (Ho2s b2s1 insufficent switching).
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2000 GMC Sierra 1500 SL 4.3L Cuts out VIN: 1GTEK14W2Y
Thanks to all that replied ,some helpfull , but alot never read my post.. Several said to check timing chain stretch and if they would have read the post completely would have seen that I already checked that!!! Anyway thanks to all... The Fix was to replace ... Trouble codes: P0339.
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