GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Yukon XL Denali 🢒 Engine 🢒 Engine Exhaust 🢒 Floor Panel Heat Shield Replacement

Removal Procedure

    Object Number: 1708990 Size: SH
  1. Remove the catalytic converter, as required. Refer to one of the following:
    2. •  Catalytic Converter Replacement
    •  Catalytic Converter Replacement - Left Side
    •  Catalytic Converter Replacement - Right Side
  2. Remove the muffler assembly, as required. Refer to Muffler Replacement .
  3. Remove the left front floor panel exhaust heat shield nuts and heat shield, as required.

    4. Object Number: 1708991 Size: SH
  4. If the vehicle is a Tahoe, Yukon, Yukon Denali, or a Escalade, remove the exhaust heat shield nuts and heat shields, as required.

    5. Object Number: 1708992 Size: SH
  5. If the vehicle is a Suburban, Yukon XL, Yukon Denali XL, Escalade ESV, Escalade EXT or a Avalanche, remove the exhaust heat shield nuts and heat shields, as required.

    6. Object Number: 1708993 Size: SH
  6. Remove the rear floor panel exhaust heat shield nuts and heat shield, as required

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1708993 Size: SH
  1. Position the rear floor panel exhaust heat shield to the studs and install the heat shield nuts.

    2. Tighten
    Tighten the nuts to 9 N·m (80 lb in).


    Object Number: 1708992 Size: SH
  2. If the vehicle is a Suburban, Yukon XL, Yukon Denali XL, Escalade ESV, Escalade EXT or a Avalanche, position the exhaust heat shield to the studs and install the heat shield nuts, as required.

    3. Tighten
    Tighten the nuts to 9 N·m (80 lb in).


    Object Number: 1708991 Size: SH
  3. If the vehicle is a Tahoe, Yukon, Yukon Denali, or a Escalade, position the exhaust heat shield to the studs and install the heat shield nuts, as required.

    4. Tighten
    Tighten the nuts to 9 N·m (80 lb in).


    Object Number: 1708990 Size: SH
  4. Position the left front floor panel exhaust heat shield to the studs and install the heat shield nuts.

    5. Tighten
    Tighten the nuts to 9 N·m (80 lb in).

  5. Install the muffler assembly, as required. Refer to Muffler Replacement .
  6. Install the catalytic converter, if necessary. Refer to one of the following:
    7. •  Catalytic Converter Replacement
    •  Catalytic Converter Replacement - Left Side
    •  Catalytic Converter Replacement - Right Side