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  1. #1

    Default 2000 Savanah Van cranks but won't start

    Hello. I am the sad owner of a 2000 Savanah Conversion van. It has the Vortec 5.7 liter motor with 80,000 miles on it. lately i have been having problem after problem with it. Most recently we all got in the van to head to 7-11 for slurpees and it cranked over and started for a fraction of a second but quickly died. i tried over and over to start it but it would not start. i put my code reader on it and it is throwing one code. P1626. the description states A/C circuit open to power B+ (VLCM) i tried disconecting the battery for 30 mins to re-set the pcm with no luck. i also checked fuses and relays and found no issues. I researched the code on-line and am a bit confused because there was one site the explained on ford vehicles the p1626 is the a/c circuit but on gm vehicles it means there is an issue with the security system. i didnt even know this vehicle had security on it. anyways i had a spare pcm i picked up from a salvage yard a while back so i swapped it out today but still i have the same problem.... the van wont start!!! anyone have any eperience with this??



  2. #2


    That code would be for the vehicle theft deterrent or passlock system.

    When you use your key to start the vehicle, the key switch sends a code to the "passlock module". Then that module sends a "password" to the vehicle control module, and this allows the fuel injectors to operate. (As opposed to not using a key to start the vehicle.)

    Look in your owner's manual for vehicle theft deterrent or theft deterrent.
    92 GMC Sierra 2500

  3. #3


    Vehicle is in the shop now. the Passlock module is dead and needs to be replaced!!

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