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Prev Professional Automotive Repair Technical Discussions for May 25, 2011
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Open Help Requests for GM
Help Request Answers
1976 Cadillac Seville 5.7L No Start VIN: 6S69R64909
Only after car sits over night, upon first start up engine will not start. Has good fuel pressure and spark at all times. Injectors are firing. Cranks good but will not fire. If small amount of starting fluid is sprayed into the throttle the car will fire righ...
2005 Cadillac Escalade 6.0L Vses VIN: 1GYEK63NX5
Got this Escalade that had the Steering wheel angle sensor replaced to cure a code C0455. Sensor is working properly now and also did a reflash of VSES system per tsb to keep C0455 from returning. Now dash keeps flashing stability system disabled and there are...
2007 Cadillac DTS L 4.6L brake lights VIN: 1GEEH06Y67
hello gruop this caddy came in with dead battery,we charged battery and then noticed the brake lights are stuck we thought simple brake switch problem...on alldata it shows it has a relay and a stop lamp fuse # 20 well this has no fuse and no relay...l...
1995 Chevrolet Blazer 4.3L Stall VIN: 1QNDT13W8S
Got this truck from another shop and they thought the problem was ignition related, but it's not. The truck runs fine when cold, but let it idle for 10-15 min and it dies. Spray fuel in the intake and it starts and then dies. Fuel Pressure is 55-60. I smoked i...
1995 Chevrolet K1500 Silverado 6.5L my truck VIN: 2GCEK19SXS
This is my truck that i have the engine out to do head gaskets. i am already planning to replace the crank sensor, and water pump rear main and crank seal. The crank sensor is oe, the water pump is leaking from the weep hole. Looking for things that would be ...
1998 Chevrolet C1500 Silverado 5.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCEC19M4W
Here's a head scratcher. I just installed a used engine in this truck due to the old engine mixing water in with the oil. The truck ran fine - the only issue was water in the oil. This used engine has approx 180,000kms. The problem is this engine won't run rig... Trouble codes: P0300 (Missfire detected)
2000 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1NE52J8Y
ok this vehicle has had the mil intermittantly come on and off very intermittantly, every time its the same codes, p0135, p0443, and p0449. i have ohm checked the heater circuit on the 02, and and tested for ground and power, all within range. same results wit... Trouble codes: P0135, P0443, P0449
2004 Chevrolet Aveo 1.6L Misfire VIN: KL1TJ62624
Looking for some help on emission failure ..04 Aveo..had used engine installed after previous engine blew a rod has failed e tests since .First tests readings were CO% limit .37 result .58 HC limit 66 result 9 NOX limit 505 result 15 dilution 15.6 High c...
2009 Chevrolet Traverse LS 3.6L Mechanical VIN: 1GNER13D39
Hello all and thanks in advance for looking into this...This customer went into a jiffylube for an oil change, vehicle was ticking, low on oil (aparently). Oil was changed 5w30 quaker state bulk oil put in. From there the noise got worse then it wouldnt start....
2001 Oldsmobile Aurora 3.5L Ebcm VIN: 1G3GR62H41
I have a 2001 Olds Aurora with an ABS light and a red brake light on and no communication with the EBCM. PCM is not recognizing it either. Verified power to pins A & B and grounds to pins F & G. Verified serial data circuit. With EBCM disconnected I have conti...
2000 Pontiac Bonneville SLE 3.8L obd 2 monitors VIN: 1G2HY54K1Y
Hi Guys, I have a 2000 pontiac bonneville sle. I cannot complete the evap, egr & catylist monitors for a smog check. I replaced the oxygen sensors about 2 months ago for a heater issue. Just replaced the thermostat last week because the cooling fans were comin...
2001 Pontiac Grand Am SE 2.4L crank,start then shut off VIN: 1G2NF52T21
I feel like its a passlock issue,just that with my solus with 11.2 it has a feature that you can power the passlock,and for 30 seconds it ran,then ac compressor came on and shut it off.When I clear codes,B2965,B2957,B2958,U1000,[...],all pointing to bc...
2005 Pontiac G6 3.5L No Start, Stall VIN: 1G2ZG52855
Vehicle came in for stalling at times and would have to wait to restart. After letting sit for approx 10 min. Vehicle would restart. Vehicle would always crank. On test drive, noticed that when vehicle would stall, nothing on that data changes. (we dont lose d... Trouble codes: C0242 (Pcm indicated tcs malfunction history), U2100 (Can bus communication), U2109 (Lost communication with pcm)

Fixes & Summaries for GM
Fix/Summary Answers
1976 Chevrolet C10 Scottsdale 5.7L crankshaft
Repaired the problem as follows: Drilled a very small dimple into the outer edge of the broken piece in the crankshaft. Used a sharpened center punch tapping into the very shall dimple a few time cause the piece to start turning. One it turned a couple of time...
1990 Chevrolet K2500 Silverado 5.7L Surge, Misfire VIN: 1GCFK24K1L
the customer needed to take his vehicle when i posted this and it has not returned yet for me to do further testing. i was gonna unplug the converter lockup to see if problem went away. thanks for the replies but the time has run out for this help request.
2009 Chevrolet Express 3500 6.0L Electronic VIN: 1GCHG39K09
Checked with the customer and since we suggested he take it to the dealer because the transmission was still under warranty and he did so. He stated that the dealer replaced transmission under warranty.
2002 GMC W4500 Forward W4S042 4.8L Wont shut down VIN: J8DC4B1492
Goofy system. It has a shut down motor that pulls a cable that moves the stop lever on the injection pump. It must see charging voltage at the shut down motor when the key is turned off to actuate the stop system. I think we have way to many overpaid engineers... Trouble codes: 11 (VS8 1 Circuit), 17 (Inhibit switch).
2003 GMC Sierra 2500 HD 6.6L Passenger side power windows VIN: 1GTHK23113
Sometimes it just takes getting away from the problem for awhile I guess. Most replies confirmed the relay box is where stated to the left of the brake pedal right at the firewall, it's what I thought was just a junction for wiring harnesses is actually the re...
1989 Pontiac 6000 LE 2.8L Stall VIN: 1G2AF51W9K
Thank you for the replies. Those who suggested injectors was right on. 2 of the 4 injectors we had not previously replaced ohmed at 9.2 and 7.8. We sugested the owner replace all remaining OE injectors and she runs like a charm. I could not get past the fact t...
2001 Pontiac Grand Am SE 2.4L Misfire, MIL Lamp on VIN: 1G2NF52TX1
thanks for all the help we found a broke wire in the harness to the icm Trouble codes: P0300.
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