2003 Chevrolet Suburban 5.3 V8 codes C0237. Transmission was rebuilt and Neutral safety switch speed sensor all replaced. Question = i have code C0237 this codes comes when i am driving around 30 mph and i go over i bump the brake light abs and rear speed sensor this has speed sensor on the transfer case you can drive the truck in the highway but as soon you go over i bump all this light comes on. Any suggestions? I disconnect all the speed sensor the abs module the transmission module i move the pcm to a better place still the problem there.
JK: There are 2 vehicle speed sensors (vss) on the transfer case. 1 on left, 1 on rt., furthest to the rear. Inspect those wires VERY carefully. Also inspect the wires all the way back to the pcm under the hood. If all look ok, would suggest running new wires to both sensors. Have had a couple trucks with similar concern, the wires test good, pulling on wires does not should a broken wire, and had to run new wires to repair. Not sure why, but that is what fixed them.