Many times when you do anything with the throttle or throttle body, you have to have the system reprogrammed. Dealerships or shops with the proper computer are the only ones that can do this and cost is $120 and up.
RepairPal Certified shops can diagnose and repair your 2007 Chevrolet Avalanche. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Thanks! I'll take it back to the place that installed it.