GEM/VSM problems
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2nd Gear
Joined: Jul 2025
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GEM/VSM problems
New here and Looking for advise, a lot of my problems have been discussed and not sure all my problems attributed to one item malfunctioning. Most problems seem to point to the GEM/VSM which I just replaced and nothing changed (used module could be bad IDK). Tried changing relays in the fuse panel in the cab.
1. Turn key and or engine on, radio and windows more often than not don't work, but will come on and work after a few minutes of running, sometimes longer run times that others. 2. Turn key on and relay in fuse panel "chatters" and truck will not start. Turn key off and on multiple times until "chatter" stops and truck will start. Occasionally while driving the truck dies and relay is "chattering". 3. Switch to engage 4x4 not working. 4. Display on overhead console not working5. Power mirrors not working6. Dome light comes on when truck is parked (removed bulbs to keep from killing battery)7. While driving at night with head lights in the "brights" position the headlights turn off but come back on when they are dimmed.8. Batteries drain over night unless disconnected.
1. Turn key and or engine on, radio and windows more often than not don't work, but will come on and work after a few minutes of running, sometimes longer run times that others. 2. Turn key on and relay in fuse panel "chatters" and truck will not start. Turn key off and on multiple times until "chatter" stops and truck will start. Occasionally while driving the truck dies and relay is "chattering". 3. Switch to engage 4x4 not working. 4. Display on overhead console not working5. Power mirrors not working6. Dome light comes on when truck is parked (removed bulbs to keep from killing battery)7. While driving at night with head lights in the "brights" position the headlights turn off but come back on when they are dimmed.8. Batteries drain over night unless disconnected.
Lead Driver
Joined: Jun 2004
Posts: 6,305
Likes: 576
From: Amarillo, TEXAS!
Assuming it's a 2002 or newer truck, the windows and radio are usually a symptom of a problem in the instrument cluster. Often, giving the dash a good smack with the palm of your hand will remedy that temporarily. The others, I've not heard of or seen happen, so I can't offer any advice there.
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