GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 3 of 3
  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??


    thanks

    matt

  2. #2

    Default

    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

    Default

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

Similar Threads

  1. Truck cranks but no start
    By smokey308 in forum General Chevy & GM Tech Questions
    Replies: 1
    Last Post: 11-16-2010, 09:54 PM
  2. Help K1500 Suburban cranks fast slow fast doesnt start
    By boyscout in forum GM Powertrain
    Replies: 1
    Last Post: 01-23-2010, 08:01 PM
  3. cranks but won't start
    By duece209 in forum Chevy Silverado Forum (GMC Sierra)
    Replies: 5
    Last Post: 01-07-2010, 06:24 PM
  4. 2000 gmc 1500 will not start !
    By skinnycycle in forum General Chevy & GM Tech Questions
    Replies: 6
    Last Post: 01-05-2010, 09:19 PM
  5. 96 K1500 Cranks but won't start
    By mattress67 in forum General Chevy & GM Tech Questions
    Replies: 10
    Last Post: 09-24-2009, 12:51 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •