RepairPal Certified shops can diagnose and repair your 1997 Chevrolet Express 2500. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Signal plate lease likely suspect... Remove sensor and inspect plate with light OR bore scope. Test circuits and wiring to sensor... Whichever engine it's got under the hood! (?)
If AFTER inspecting signal plate, it is damaged, 'somehow' the front of the engine will have to be disassembled to access it... It's behind the timing cover.. I've been doing auto repair for a LOT of years (too many) and I have NEVER had a problem with GM signal plates and very rarely the crank sensors .. This is well beyond a DIY repair... Good luck with yours..
350 Vortec V-8 engine 5.7L
If AFTER inspecting signal plate, it is damaged, 'somehow' the front of the engine will have to be disassembled to access it... It's behind the timing cover.. I've been doing auto repair for a LOT of years (too many) and I have NEVER had a problem with GM signal plates and very rarely the crank sensors .. This is well beyond a DIY repair... Good luck with yours..