Heat in 1999 Astro Van
Question:
I had seen somewhere that GM came out with a service bulletin relating to the fact that Astros/Safaris had a problem with heat on the passenger side of the van, but not on the Drivers side. Anyone have any information relating to that? Winter is coming and I know I was cold last year…. Thanks, Dave
Response:
tsb # 01-01-38-003 Poor Heat Distribution in Driver’s Area of Vehicle (Install New Heat Diverter Ducts) 1996-2001 Chevrolet and GMC M/L-Van Models Built Prior to the following VIN Breakpoints: Make VIN Breakpoint Chevrolet 1B111821 GMC 1B504468 This condition may be corrected by installing a newly designed center heat duct and diverter tube. Use the following procedure and the part numbers listed below to install the new ductwork. Remove the screw covers from the top of the instrument panel (IP) extension and remove the retaining screws. Remove the retaining nuts from the bottom of the IP extension. Remove the IP extension from under the IP by pulling the extension outward and disconnecting the electrical connector. Remove the screws (total of 3) that retain the driver’s knee bolster to the IP. Disconnect the park brake release cable from the park brake assembly and remove the knee bolster from the vehicle. Place the knee bolster on a clean, flat surface with the colored side up. The knee bolster will be resting on the lower edge tabs on the bench. The right side tab is where the tube must be attached. Lift the knee bolster and place the mounting of the flexible heat duct on the right side mounting tab of the knee bolster. Mark and drill two 5 mm (13/64 in) holes in the knee bolster mounting flange. Attach the mounting flange to the knee bolster with the screws. Tighten Tighten the screws to 2 N
