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  1. #1

    Default Truck Almost Dies And Weird Things Happening Please Help Me

    Ok well tonight i was driving my truck and as i was shifting through the gears, at about 30 MPH when it shifted, the RPMs went way down almost as if the truck was going to die. So i let off the gas and it went back to normal because it then shifted down. So I go to take back off and when it shifted up again it did the same thing. As I was driving i looked over and noticed the 4x4 light was on the 4 low. I didnt change this unless i accidentally hit it but im pretty sure i didnt. so i come to a stop and i push the 2wd buttom and it makes the noise as if it was going in but i go to take off and it switched but into 4 low and the light was still on 4 low. So i stopped again and it changed to 2wd this time when i pressed the button. It was just weird how the truck almost died when it shifted going down the road. Any ideas please let me know.

    Also the other night i was driving and all the gauges in my dash went to as if he truck was turned off and then all turned back on but the truck was never shut off and it was dinging but then went back to normal. I was driving the whole time. So idk what is going on. Thanks

    2003 Chevy Silverado 2500HD
    All Blacked Out
    2" Leveling Kit with 3" Body Lift
    35" Nitto Mud Grapplers
    6.0L Vortec Z71
    K&N Cold Air Intake
    OBX Long Tube Headers
    Full True Dual Exhaust System
    High Flow Cats

  2. #2
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    murdog94's Avatar
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    Default

    IS the Check Engine light on? That is for sure where i would start.
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  3. #3

    Default

    Did you try pulling any codes for the truck or taking it to an auto parts store and having them hook it up to one of their diagnostic machines? Sounds like an electrical/fuse problem.
    2003 Silverado 2500HD 6.0L Vortec V8
    2" Body Lift
    3" Suspension Lift
    Skyjacker Hydro 7000 Shocks
    Skyjacker Steering Stabilizer
    35" Tires with 20" American Racing Rims
    Velocity Cold Air Intake
    Billet Throttle Body Spacer
    BBK Performance Headers
    MBRP Cat-Back Exhaust System
    DiabloSport Predator- Soon to be tuned by Diablew

    "Soon to be leveling-kit"

  4. #4

    Default

    The service engine light is not on. I haven't taken it anywhere yet. Just wanted to see if anybody had any idea what it could be

    2003 Chevy Silverado 2500HD
    All Blacked Out
    2" Leveling Kit with 3" Body Lift
    35" Nitto Mud Grapplers
    6.0L Vortec Z71
    K&N Cold Air Intake
    OBX Long Tube Headers
    Full True Dual Exhaust System
    High Flow Cats

  5. #5

    Default

    I know this may sound simple but try tightening your battery cables. I've seen wierd elec. problems and it was just loose cables.

  6. #6

    Default

    ok ill try that as soon as i get home.. imma outta town for a few days. Also another strange thing iv seen it do a couple times is that while im driving the red neutral light will be on between the 2wd and 4hi buttons. I just push 2wd and the light would change but.

    2003 Chevy Silverado 2500HD
    All Blacked Out
    2" Leveling Kit with 3" Body Lift
    35" Nitto Mud Grapplers
    6.0L Vortec Z71
    K&N Cold Air Intake
    OBX Long Tube Headers
    Full True Dual Exhaust System
    High Flow Cats

  7. #7
    Sr. Mechanic trapperdon's Avatar
    Join Date
    Feb 2010
    Location
    rainville ( Seattle )
    Posts
    169

    Default

    i take it that its electronic push button 4wd control module on the dash & NOT a shift lever on the floorboard?
    you have a short in you shift control, and possibly a bad signal being sent to the nuetral switch that is telling it
    to shift into 4 low...
    you need to get under your dash and start jiggling wires one at a time, one of em is loose.
    just hope that its one thats not under the rig on the transfer case where you cant get at it...
    :fighting0037:
    when in doubt, doubletap !

    - buying a new truck, one part at a time :grrrrrr:
    94 Blazer 4x4 k1500 5.7 L - aftermarket cold air intake
    Energy Suspension swaybar & upper and lower control arm bushings
    Pro Comp ES 9000 front shocks, new front drive axles,
    stainless front brake rotors & new pads,
    new Moog front end ball joints, Smittybilt black nerf bar steps,
    MB Racing rims & Hankook ATm off road tires

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