Fastener Specifications
WARNING: This page is about a different car, the 2021 GMC Sierra 3500 HD and 2021 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Single Use Non - Threaded Fasteners / Components
|
NOTE:
All fasteners / components listed in this table MUST BE DISCARDED and replaced with NEW after removal. |
|---|
| Application |
| Catalytic Converter Gasket |
| Exhaust Front Pipe Gasket |
| Exhaust Manifold Gasket |
| Exhaust System Seal |
| Exhaust Turbocharger Inlet Pipe Gasket |
Single Use Threaded Fastener / Component tightening Specifications
|
NOTE:
All fasteners / components listed in this table MUST BE DISCARDED and replaced with NEW after removal. |
|
|---|---|
| Application | Specification |
| Metric (English) | |
| Catalytic Converter Clamp | 12 N.m (106 lb in) |
| Exhaust Manifold Bolt (L8T) Refer to procedure for tightening sequence and torque values. |
Exhaust Manifold Replacement - Left Side (L8T) Exhaust Manifold Replacement - Left Side (L5P) , or Exhaust Manifold Replacement - Right Side (L8T) Exhaust Manifold Replacement - Right Side (L5P) |
| Exhaust Pipe Clamp | Exhaust Front Pipe Installation |
Reusable Threaded Fastener tightening Specifications
|
NOTE:
All fasteners listed in this table can be reused after removal. |
|
|---|---|
| Application | Specification |
| Metric (English) | |
| Catalytic Converter Brace Bracket Bolt @ Exhaust Front Bracket Lower, Upper (L5P) | 25 N.m (18 lb ft) |
| Catalytic Converter Brace Bracket Bolt @ Exhaust Front Bracket (L5P) | 22 N.m (16 lb ft) |
| Catalytic Converter Heat Shield Bolt (L5P, Long) | 10 N.m (89 lb in) |
| Catalytic Converter Heat Shield Bolt (L5P, Short) | 25 N.m (18 lb ft) |
| Exhaust Bracket Stud | 22 N.m (16 lb ft) |
| Exhaust Front Pipe Nut | 50 N.m (37 lb ft) |
| Exhaust Heat Shield Bolt | 9 N.m (80 lb in) |
| Exhaust Heat Shield Retainer | 2.5 N.m (22 lb in) |
| Exhaust Manifold Heat Shield Bolt | 10 N.m (89 lb in) |
| Exhaust Pipe Heat Shield Bolt | 10 N.m (89 lb in) |
| Exhaust System Rear Nut | 45 N.m (33 lb ft) |
| Exhaust Turbocharger Inlet Pipe Adapter Bolt | 58 N.m (43 lb ft) |
| Turbocharger Heat Shield Bolt | 10 N.m (89 lb in) |