any one with starting problems maybe bcm?

Rick Gaddis

Asked by Jun 14, 2015 at 04:04 PM about the 2003 Chevrolet Silverado 2500HD 4 Dr LS Crew Cab SB HD

Question type: Maintenance & Repair

turn key and nothing happens . hit the lock then unlock , sometimes two or three tries ,
then it cranks but wont start. only once it reset after changing the cam sensor  but never
reset again. tried all the bypass reset methods but to no avail. any suggestions or
answers would be helpful . im going nuts on this

1 Answer


2007.5 hit a bump and complicated many things, including no park pawl. Tranny seal had gone out at 20000 miles as the dealer was clearly stating that warranty would cover it. Towing a lot with a car hauler often with a 2500 lb mini escavator, I was ALWAYS gentle, even noticing the weight not having much effect on the Vortec 6.- The integrated factory braking system perfectly worked for a week. And half the parking brake was discovered frayed and blackened, prompting me to fix it for safety reasons alone. Before handing it over for an overhaul, the brake system had now been replaced by two large companies. One wasn't legally able to work on personal vehicles and was the second and last fix. The truck has four blunt wires and sometimes requires a proportional brake controller and the origional system cannot be replicated unless its reinstalled. GM said I get 1 hour diagnosis free but minimum $900 to remove what was determined as Useless since no telling what damage could result. I said they added an extra two wires and a cheap controller and then asked pricing a another module product extremely sensitive to grounds on both vehicles and was even without the option that they said. I quess its smarter to end the story and give my unproven advise. Something major may occur to that diesel or gas guzzler more subtly at first like the system you bought it for using at critical times that are rarely expected, which can spread like a virus of codes and SECURITY RELATED IGNITION PROBLEMS< Try to check the lighs if they indeed indicate security or anti-theft devices like keys arent the culprit. The BCM reads the value of resistance and passes it to the PCM which matches it with it was a sure taught answer. Ejen in fat the BCM reading the battery; with the poor grounds, MISSING CELLS, CORRODED TERMINALS AND THE LAST GUY WHO FOR A TON OF MONEY HAND TIGHTENED ONLY TWO OF THE LARGEST NEGATIVE GROUNDS FROM THE BATTERY TO THE ENGINE BLOCK AND THE FIREWALL, 2 OR THEM, PROTRUDING FROM BEHIND THE SPEEDOMETER. The hood is connected to the one on the firewall to prevent rust on the hinges indicating the fact to me that its hood had to be taken off at one point during the 18000 miles before my purchase and that the other one was never connected at the top.It was simply dangling collecting dust. Grounds, terminals and the obvious; then make sure the key is working the one chance you get before the vehicle takes itself out without he memory being set on the resistance for an inline resister on a starter circuit wire negating the throwing of a good but poorly-designed vehicle to the dealers, as they are more complicating then a morning conclusion that the resistor in the toaster may start the rejuvenation of a malady accepted as the norm today. $$$, soak braided ground wires in coca cola and 89 cents is owed. That includes the resistor matching fairly closely the origional bcm message to the PCM. Thank God for those who never give up.

Your Answer

Add photo

Related Questions

  • my front parking lights wont go off...any idea why? 5 answers

    2001 Chevrolet Silverado 2500HD Crew Cab LB 4WD


    Maintenance & Repair

  • Electrical problem 4 answers

    The lights flicker when braking,cruse turns off when using blinker.Turn on high beam lights and transmission down shifts from 6th to 2nd gear. All gauges lose power. This last a short time then retur...

    2007 Chevrolet Silverado 2500HD LTZ Extended Cab 4WD


    Maintenance & Repair

  • 2003 Silverado 2500HD No dash/ignition response 3 answers

    Replaced a dead dash assembly in my truck. It has nothing responding on new dash assembly. The ignition won't turn over. Radio, windshield wipers, and hazards work, but nothing else seems to. Not ev...

    2003 Chevrolet Silverado 2500HD


    Maintenance & Repair

  • 2002 Chevy Corvette bad BCM/WIRES? 9 answers

    I have a 2002 Chevy Corvette. It is an automatic. In the past 4 days my car would not start. It would turn over but would not start. I had a mobile mechanic come out and decided it was the alternato...

    2002 Chevrolet Corvette Coupe


    Maintenance & Repair

  • What electrical problems will be solved by replacing a BCM with a new one 1 answer

    2003 Chevrolet Monte Carlo LS


    Maintenance & Repair

Search Chevrolet Silverado 2500HD Questions

Chevrolet Silverado 2500HD Experts

#1 Steven Loeffler
Steven Loeffler
Reputation 420
#2 FordNut
Reputation 280
#3 Tom Demyan
Tom Demyan
Reputation 260
View All

Related Models For Sale

Used GMC Sierra 2500HD"
165 Great Deals out of 15,344 listings starting at $1,900
Used Ford F-250 Super Duty"
462 Great Deals out of 42,860 listings starting at $1,000
Used Chevrolet Silverado 1500"
2,455 Great Deals out of 144,272 listings starting at $1,995
Used Dodge Ram 2500"
159 Great Deals out of 5,799 listings starting at $2,289
Used Chevrolet Silverado 2500"
5 Great Deals out of 285 listings starting at $2,890
Used Ford F-150"
3,237 Great Deals out of 216,704 listings starting at $1,000
Used GMC Sierra 1500"
1,054 Great Deals out of 56,406 listings starting at $2,400
Used Ford F-350 Super Duty"
450 Great Deals out of 26,914 listings starting at $3,600
Used Chevrolet Silverado 1500HD"
17 Great Deals out of 314 listings starting at $4,850
Used Toyota Tundra"
631 Great Deals out of 26,615 listings starting at $2,500
Used Dodge Ram 3500"
109 Great Deals out of 2,483 listings starting at $4,995

Used Cars For Sale

2016 Chevrolet Silverado 2500HD For Sale
46 Great Deals out of 22,973 listings starting at $24,563
2015 Chevrolet Silverado 2500HD For Sale
35 Great Deals out of 2,230 listings starting at $17,995
2014 Chevrolet Silverado 2500HD For Sale
14 Great Deals out of 598 listings starting at $16,990
2013 Chevrolet Silverado 2500HD For Sale
14 Great Deals out of 1,089 listings starting at $8,900
2012 Chevrolet Silverado 2500HD For Sale
8 Great Deals out of 685 listings starting at $9,900