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Prev Professional Automotive Repair Technical Discussions for August 4, 2011
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Open Help Requests for GM
Help Request Answers
1995 Buick Roadmaster Estate Wagon 5.7L compressor
Hi guys, a couple of quick questions, does the system in this big wagon supposed to run continuously or cycle? IS there an orifice tube and if so where? I notice that the auxilliary electric fan cycles but the compressor remains running constantly. What contro...
1976 Chevrolet K20 Custom Deluxe 6.6L pings VIN: CKU246Z131
Got this problem from another shop, This engine pings uncontrollably, even with timing retarded to 20 degrees total! Customer runs 91 octane fuel, checked emissions under load and it runs within the proper perameters, not too rich and not too lean! rebuilt car...
2002 Chevrolet Trailblazer EXT LT 4.2L MIL Lamp on VIN: 1GNDT13SX2
This vehicle sets code p1482 very intermittantly. I have tested the fan per factory trouble chart, and cannot find a problem. Fan engages when commanded on with Tech2. Fan disengages when commanded off. Fan will match any desired speed of PCM. I have checked a... Trouble codes: P1482
2003 Chevrolet Silverado 2500 HD 6.6L motor VIN: 1GCHK23113
truck runs great but it will not restart until full cool down dont no much about the gmc lots of experience with 6.0 ford if it was a ford no codes like this one i would say must have a high preasure oil leak think yal rock first post i dont like my maf readin...
2003 Chevrolet Silverado 2500 HD 6.0L Starter VIN: 1GCHK29U53
this is my own truck and about half the time when starting it will start up, then the starter will disengage and then will reengage right away and grind for 2 or 3 second before stopping, the vehiucle always staarts up and runs it is just embarrasing to have i...
2005 Chevrolet Aveo LS 1.6L Hesitation, Cuts out, MIL Lamp on VIN: KL1TD626X5
Hello out there to all you chevy aveo technicans out there) igot this chevy aveo that wil hesitate severely, back pop through the intake(and falls onits face) it only does it every once and awhile) feels like no fuel pressure. But fuel pressue is steady at 65 ... Trouble codes: P0420 (Catalytic converter effiency)
1997 GMC Yukon SL 5.7L MIL Lamp on VIN: 3GEK18R5VG
I have checked for play in timing chain when move crank dist turn when turn crank both ways immediately. Help? Trouble codes: P1345
2007 GMC Acadia SLT 3.6L do not know VIN: 1GKEV33767
There is an intermittent "knock" noise coming from under the vehicle while you are driving. It happens about once every 30 minutes or up to 2 hours of driving. It is a loud "knock" and I cannot tell if the noise is coming from the front or back of the SUV. It ...
1998 Pontiac Grand Prix GTP 3.8L left side A/C output VIN: 1G2WP5219W
I have this 98 Grand Prix that is not blowing cold from the drivers side only. I've searched and read most of the fixes in the data base for this type of problem. Most of them are low refridgerant charge. This is not the case on this one. It had a leak, and af...
1999 Pontiac Grand Am SE 2.4L Inner timing cover VIN: 1G2NE12TXX
Feel stupid for having to ask this but this is the first Quad 4 I've gone this deep into. Trying to remove the INNER timing cover and I've got the timing chain/guides off, all the lower bolts and oil pan bolts off. I also have the 4 bolts per cam off and the 3...
2003 Pontiac Grand Prix GT 3.8L engine VIN: 1G2WP52K43
This car came in with a coolant leak replaced upper intake, came back 1 m,onth later, leaking again, coolant is comming from between engine and transaxle,cannot find any leak on the upper side of the engine, wanting to know if anyone else has run into this bef...
2005 Pontiac Grand Prix 3.8L Hesitation, MIL Lamp on VIN: 2G2WP52235
Intermittent problen going on for over 1 year. Code P1106 - MAP sensor code. Replaced MAP with ACD sensor - OK for 2 months and code returned. Checked wiring at MAP plug to computer - OK, Pin test - OK, wiggle test - OK. Replaced PCV valve and "O" rings - OK f... Trouble codes: P1106 (intermittent high voltage on MAP sensor)

Fixes & Summaries for GM
Fix/Summary Answers
2001 Cadillac Catera 3.0L Brakes VIN: W06VR54RX1
The customer's concern has been resolved. It turned out to be the lower control arm bushings that were at fault. Upon some vigoruous research on the internet in regards to the vehicle I came across an article that stated some potential vibration issues with th...
1988 Chevrolet Camaro 5.0L runs away VIN: 1243FGTR6W
found that the ecm was faulty checked the tps, map everything seemed great. checked power and groung to the ecm all were good. replaced with used ecm and now it idles good and runs better then it did before.
1996 Chevrolet Beretta Z26 3.1L Cuts out, Misfire, Poor Fuel Economy VIN: 1G1LW5M2TY
This car is still not fixed, its been on the back burner since they don't need the car. I do thank you all that replied. I have not felt a miss this wk but I am still working on the long fuel trim. the LTF trim at idle is around -15 raise rpm to 1200 to 1500 a...
1999 Chevrolet Malibu 3.1L starts and dies VIN: 1G1ND52JOX
we have tried everything posted so far with no luck. tried ecm tried unplugging each module, checked and rechecked all grounds, tried key switch. for lack of anything else to try we are closing it thanks for all that replied
2004 GMC Sierra 1500 SLE 5.3L MIL Lamp on VIN: 1GTEK14T54
replaced complete accelerator assembly with gm part,truck is fixed, We used an after market sensor first time big mistake Trouble codes: P1125, P2125.
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