2003 Chev 2500HD 6.0L U P120/P2135

[ktmlew]

The above codes reference a TPS/APP issue. I have done a wiggle test of the wiring. Am i expecting it to stall or just kick a code?

[sneakypete]

engine light comes on and goes into reduced power. have had a couple things set this code. pull the conduit back at the tb connector and give each wire a tug. I think it's the yellow wire that likes to break. ground problems at g103 and g104 can set this dtc. when I was at the dealer, the guaranteed fix was a rewire. pcm to tb new terminals end to end. I've seen people have luck with soldering the tb terminals only. also check the freeze frame for a low voltage concern. this will set the dtc's as well.