high reading rpm gauge
Question not understandable,do you mean just guage reading high with no engine rev,and is truck running out normal?
Gauge does not drop at. Engine cut off, sticks where it was reading while running
This may just be the tach/RPM sending unit is going bad and need,s replacing.
Looking for a Used Tahoe in your area?
CarGurus has 27,693 nationwide Tahoe listings starting at $600.
Search Chevrolet Tahoe Questions
Chevrolet Tahoe Experts