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Fastener Specifications

WARNING: This page is about a different car, the 2023 GMC Sierra 3500 HD and 2023 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
GM5733390Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Catalytic Converter Heat Shield-Oxidation Catalytic Converter (L5P)

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Catalytic Converter Heat Shield Bolt - - 10 N.m (89 lb in) Catalytic Converter Heat Shield Replacement (L5P) 
2 Catalytic Converter Heat Shield Bolt [3x] - - 25 N.m (18 lb ft) Catalytic Converter Heat Shield Replacement (L5P) 
3 Exhaust System Front Gasket Yes - - Oxidation Catalytic Converter Replacement (L5P) 
4 Catalytic Converter Gasket Yes - - Oxidation Catalytic Converter Replacement (L5P) 
5 Exhaust Pipe Clamp Yes - 12 N.m (106 lb in) Oxidation Catalytic Converter Replacement (L5P) 
6 Catalytic Converter Clamp Yes - 12 N.m (106 lb in) Oxidation Catalytic Converter Replacement (L5P) 
GM5731753Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Exhaust Front Bracket (L5P)

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Catalytic Converter Brace Bracket Bolt - - 22 N.m (16 lb ft) Exhaust Front Bracket Replacement (L5P) 
2 Exhaust Bracket Stud - - 22 N.m (16 lb ft) Exhaust Front Bracket Replacement (L5P) 
GM5731770Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Exhaust Front Bracket-Lower (L5P)

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Exhaust Front Bracket Stud Plate Assembly - - - Exhaust Front Bracket Replacement - Lower (L5P) 
2 Exhaust Front Pipe Nut [2x] - - 50 N.m (37 lb ft) Nitrogen Oxides Catalytic Converter Replacement (L5P, 2WD) , or Nitrogen Oxides Catalytic Converter Replacement (L5P, 4WD) 
3 Catalytic Converter Brace Bracket Bolt [2x] - - 25 N.m (18 lb ft) Exhaust Front Bracket Replacement - Lower (L5P) 
GM5777758Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Exhaust Front Bracket-Upper (L5P)

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Exhaust System Front Gasket Yes - - Exhaust Front Pipe Replacement (L5P, 2WD) , or Exhaust Front Pipe Replacement (L5P, 4WD) 
2 Exhaust Pipe Clamp Yes - - Exhaust Front Pipe Replacement (L5P, 2WD) , or Exhaust Front Pipe Replacement (L5P, 4WD) 
3 Catalytic Converter Brace Bracket Bolt [4x] - - 25 N.m (18 lb ft) Exhaust Front Bracket Replacement - Lower (L5P) 
GM5681926Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Exhaust Front Bracket-Exhaust Pipe Hanger Insulator (L8T)

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Exhaust Manifold Nut - - 20 N.m (15 lb ft) Exhaust Front Bracket Replacement (L8T) 
2 Exhaust Pipe Hanger Bracket Nut - - 22 N.m (16 lb ft) Exhaust Pipe Hanger Insulator Replacement (L8T) 
3 Exhaust Bracket Stud - - 22 N.m (16 lb ft) Exhaust Front Bracket Replacement (L8T) 
GM5680368Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Exhaust Front Underbody Heat Shield-Exhaust Rear Underbody Heat Shield

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Exhaust Heat Shield Retainer [11x] - - 2.5 N.m (22 lb in) Exhaust Front Underbody Heat Shield Replacement 
Exhaust Rear Underbody Heat Shield Replacement (L8T) 
GM5681935Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Exhaust Heat Shield-Exhaust Intermediate Underbody Heat Shield

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Exhaust Heat Shield Retainer [3x] - - 2.5 N.m (22 lb in) Exhaust Intermediate Underbody Heat Shield Replacement (L8T) 
2 Exhaust Heat Shield Retainer [2x] - - - Exhaust Heat Shield Replacement (L8T) 
3 Exhaust Front Underbody Heat Shield Retainer [2x] - - - Exhaust Heat Shield Replacement (L8T) 
GM5620356Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Exhaust Manifold Heat Shield-Exhaust Manifold (L8T)

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Exhaust Manifold Lower Heat Shield Bolt [3x] - - 9 N.m (80 lb in) Exhaust Manifold Heat Shield Replacement - Left Side (L8T) 
Exhaust Manifold Heat Shield Replacement - Right Side (L8T) 
2 Exhaust Manifold Bolt [5x] Yes - Exhaust Manifold Bolt Torque Sequence - Left Side  Exhaust Manifold Replacement - Left Side (L8T) 
Exhaust Manifold Bolt Torque Sequence - Right Side  Exhaust Manifold Replacement - Right Side (L8T) 
3 Exhaust Manifold Gasket Yes - - Exhaust Manifold Replacement - Left Side (L8T) 
Exhaust Manifold Replacement - Right Side (L8T) 
GM5736523Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Exhaust Manifold Heat Shield-Left Side (L5P)

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Exhaust Manifold Heat Shield Bolt [4x] - - 10 N.m (89 lb in) Exhaust Manifold Heat Shield Replacement - Left Side (L5P) 
2 Exhaust Manifold Nut [8x] - - Exhaust Manifold - Left Side Bolt Sequence  Exhaust Manifold Replacement - Left Side (L5P) 
3 Exhaust Manifold Stud Spacer [8x] - - - Exhaust Manifold Replacement - Left Side (L5P) 
4 Exhaust Manifold Gasket Yes - - Exhaust Manifold Replacement - Left Side (L5P) 
GM5906095Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Exhaust Manifold Heat Shield-Right Side (L5P)

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Exhaust Manifold Heat Shield Bolt [5x] - - 10 N.m (89 lb in) Exhaust Manifold Heat Shield Replacement - Right Side Front (L5P) 
Exhaust Manifold Heat Shield Replacement - Right Side Rear (L5P) 
2 Exhaust Manifold Nut [8x] - - Exhaust Manifold - Right Side Bolt Sequence  Exhaust Manifold Replacement - Right Side (L5P, Waiting for EGR Valve Content) 
3 Exhaust Manifold Stud Spacer [8x] - - - Exhaust Manifold Replacement - Right Side (L5P, Waiting for EGR Valve Content) 
4 Exhaust Manifold Gasket Yes - - Exhaust Manifold Replacement - Right Side (L5P, Waiting for EGR Valve Content) 
GM5743480Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Exhaust Pipe Heat Shield-Left Side (L5P)

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Catalytic Converter Heat Shield Bolt [4x] - - 10 N.m (89 lb in) Exhaust Pipe Heat Shield Replacement - Left Side (L5P) 
 
GM5743556Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Exhaust Pipe Heat Shield-Right Side (L5P)

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Catalytic Converter Heat Shield Bolt [3x] - - 10 N.m (89 lb in) Exhaust Pipe Heat Shield Replacement - Right Side 
 
GM5779435Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Exhaust Turbocharger Inlet Pipe Adapter (L5P)

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Turbocharger Bracket Bolt [4x] - - 58 N.m (43 lb ft) Exhaust Turbocharger Inlet Pipe Adapter Replacement (L5P) 
 
GM5739799Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Exhaust Turbocharger Inlet Pipe (L5P)

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Exhaust Turbocharger Inlet Pipe Bolt [6x] - - Exhaust Turbocharger Inlet Pipe Bolt Sequence  Exhaust Turbocharger Inlet Pipe Replacement - Left Side (L5P) 
Exhaust Turbocharger Inlet Pipe Replacement - Right Side (L5P, 2WD) , or Exhaust Turbocharger Inlet Pipe Replacement - Right Side (L5P, 4WD) 
2 Exhaust Turbocharger Inlet Pipe Gasket [2x] Yes - - Exhaust Turbocharger Inlet Pipe Replacement - Left Side (L5P) 
Exhaust Turbocharger Inlet Pipe Replacement - Right Side (L5P, 2WD) , or Exhaust Turbocharger Inlet Pipe Replacement - Right Side (L5P, 4WD) 
GM5735676Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Nitrogen Oxides Catalytic Converter (L5P)

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Exhaust System Rear Nut [4x] - - 45 N.m (33 lb ft) Exhaust Particulate Filter Replacement (L5P, Chassis Cab Long Wheelbase) , or Exhaust Particulate Filter Replacement (L5P, Chassis Cab Short Wheelbase) , or Exhaust Particulate Filter Replacement (L5P) 
2 Exhaust System Seal Yes - - Nitrogen Oxides Catalytic Converter Replacement (L5P, 2WD) , or Nitrogen Oxides Catalytic Converter Replacement (L5P, 4WD) 
3 Exhaust Front Pipe Nut [4x] - - 50 N.m (36 lb ft) Nitrogen Oxides Catalytic Converter Replacement (L5P, 2WD) , or Nitrogen Oxides Catalytic Converter Replacement (L5P, 4WD) 
4 Exhaust System Seal Yes - - Nitrogen Oxides Catalytic Converter Replacement (L5P, 2WD) , or Nitrogen Oxides Catalytic Converter Replacement (L5P, 4WD) 
GM5680355Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Three-Way Catalytic Converter

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Exhaust Front Pipe Nut [6x] - - 50 N.m (37 lb ft) Three-Way Catalytic Converter Replacement (L8T, 2WD) , or Three-Way Catalytic Converter Replacement (L8T, 4WD) 
2 Exhaust Heat Shield Bolt [2x] - - 9 N.m (80 lb in) Exhaust Front Pipe Heat Shield Replacement - Left Side (L8T) 
Exhaust Front Pipe Heat Shield Replacement - Right Side (L8T) 
3 Exhaust System Seal Yes - - Three-Way Catalytic Converter Replacement (L8T, 2WD) , or Three-Way Catalytic Converter Replacement (L8T, 4WD) 
4 Exhaust System Seal Yes - - Three-Way Catalytic Converter Replacement (L8T, 2WD) , or Three-Way Catalytic Converter Replacement (L8T, 4WD) 
5 Exhaust System Rear Nut [2x] - - 50 N.m (37 lb ft) Three-Way Catalytic Converter Replacement (L8T, 2WD) , or Three-Way Catalytic Converter Replacement (L8T, 4WD) 
GM5779638Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Turbocharger Heat Shield (L5P)

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Turbocharger Heat Shield Bolt - - 10 N.m (89 lb in) Turbocharger Heat Shield Replacement (L5P) 
 
GM5732863Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Turbocharger Heat Shield-Left Side-Right Side

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Turbocharger Heat Shield Bolt [6x] - - 10 N.m (89 lb in) Turbocharger Heat Shield Replacement - Left Side (L5P) 
Turbocharger Heat Shield Replacement - Right Side (L5P) 
GM5911732Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Wiring Harness Bracket

Callout Component Name Single Use Fastener/Component Thread Locking Adhesive Required Specification Procedure
Metric (English)
1 Wiring Harness Bracket Bolt [2x] - - 9 N.m (80 lb in) Exhaust Manifold Heat Shield Replacement - Left Side (L8T) , or Exhaust Manifold Heat Shield Replacement - Left Side (L5P) 
 
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