Well it was worth a shot. Have you looked at the pcm pin itself? On odd occasions they will recess & you have to pull them out with some needle nose pliars. I'm just throwing it out there as it happened to me & was tripping a code for EBCM communication.
1999 Tahoe LT, 4x4, 5.7
315x75x16 BFG A/T's on 16x10, Doug Thorley Tri-Y Headers, Borla dual exhaust, 6" Pro Comp lift, JDK tail lights, Grizzly tail light guards, grill/brush guard, Pilot lights, 4.56 gears, SSBC Force 10 brake kit, tru-trac, ProCharger, BlackBear Performance Tune, 255 lph intank Walbro, 12200411 pcm swap.
In Progress:
- Intake swap with 44# LS3 injectors & 0411 pcm tune
- 2002 Denali XL: MP112 comins soon!
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