GMC Sierra 1999-2007 (1st gen)

The first-generation GMC Sierra, produced from 1999 to 2007, was a part of the Silverado/Sierra pickup truck platform developed by General Motors. It marked the transition from the old C/K series to the Sierra nameplate, which is still prominent today. This generation introduced key features and design changes, such as a more aerodynamic exterior, improved interior comfort, and enhanced safety measures. The Sierra came in various configurations, including regular cab, extended cab, and crew cab, allowing buyers to choose the one that best suited their needs.

One of the standout features of this generation was the availability of the Quadrasteer four-wheel steering system, which greatly improved the truck's maneuverability, especially in tight spaces. Additionally, it offered various engine options, including V6 and V8, to cater to a diverse customer base with varying performance needs. The first-generation Sierra laid the foundation for the modern Sierra lineup, emphasizing durability, reliability, and versatility, which are still essential characteristics of GMC trucks today.

GMC Sierra specification, engine oil capacity, spark plug gap, safety rating, fuel consumption, transmission, and light bulb sizes.

Engine 6.0L 8-Cylinder

• Recommended Oil viscosity: 5W-30
• Oil certification: API
• Drain Plug Torque: 18 FT-LBS
• Oil capacity: 6.0 quarts

Spark Plug Gap

• 6.0L 8-Cylinder : 0.040”

Engine 8.1L 8-Cylinder

• Recommended Oil viscosity: 5W-30
• Oil certification: API
• Drain Plug Torque: 21 FT-LBS
• Oil capacity: 4.5 quarts

Spark Plug Gap

• 8.1L 8-Cylinder: 0.060”

Engine 6.6L 8-Cylinder

• Recommended Oil viscosity: 15W-40
• Oil certification: API
• Drain Plug Torque: 18 FT-LBS
• Oil capacity: 10.0 quarts

Air Conditioning Refrigerant R134a

• Capacity: 1.6 lbs (0.7 kg)

Cooling System

• VORTEC™ 4300 V6 Automatic with Front A/C*: 14.8 qts (14.0 L)
• VORTEC™ 4300 V6 Automatic with Front A/C**: 16.4 qts (15.5 L)
• VORTEC™ 4300 V6 Manual with Front A/C*: 15.1 qts (14.3 L)
• VORTEC™ 4300 V6 Manual with Front A/C**: 16.6 qts (15.7 L)
• VORTEC™ 4800 V8 Automatic with Front A/C**: 16.8 qts(15.9 L)

• VORTEC™ 4800 V8 Manual with Front A/C**: 17.0 qts (16.1 L)
• VORTEC™ 5300 V8 Automatic with Front A/C**: 16.8 qts (15.9 L)
• VORTEC™ 6000 V8 Automatic* : 16.0 qts(15.1 L)
• VORTEC™ 6000 V8 Automatic**: 16.7 qts (15.8 L)
• VORTEC™ 6000 V8 Manual* :16.4 qts (15.5 L)
• VORTEC™ 8100 V8 HD Automatic*:25.0 qts (23.7 L)
• VORTEC™ 8100 V8 Automatic*: 26.9 qts (25.5 L)
• VORTEC™ 8100 V8 Manual*: 27.1 qt (25.6 L)

* Engine Fan Driven cooling system

** Electric Cooling Fan system

Fuel

• Short Bed and 2500 LD: 26.0 gal (98.0 L)
• Long Bed and Chassis Cab (Pickup Box Delete): 36.0 gal (136.0 L)
• Chassis Cab 3500 and 3500HD — front : 27.0 gal (102.0 L)
• Chassis Cab 3500 and 3500HD — rear : 23.0 gal (87.0 L)

Engine Coolant

• Type: 50/50 mixture of clean, drinkable water and use only DEX-COOL® Coolant.

Hydraulic Brake System

• Type: Delco® Supreme 11 Brake Fluid or equivalent DOT-3 brake fluid.

Windshield Washer Solvent

• Type: Optikleen® Washer Solvent.

Hydraulic Clutch System (5–Speed Trans.)

• Type: Hydraulic Clutch Fluid (GM Part No. U.S. 12345347, in Canada 10953517) or equivalent DOT-3 brake fluid

Hydraulic Clutch System (6–Speed Trans.)

• Type: Hydraulic Clutch Fluid. Use only GM Part No. U.S. 88958860, in Canada 88901244, Super DOT-4 brake fluid

Power Steering System

• Type: GM Power Steering Fluid (GM Part No. U.S. 89021184, in Canada 89021186)

Manual Transmission (5–Speed with Low Gear, RPO MW3)

• Type: GM Goodwrench® Synthetic ManualTransmission Fluid (GM Part No. U.S. 12346190, in Canada 10953477) or equivalent SAE 75W-85 GL-4 gear oil

Manual Transmission (5–Speed without Low Gear, RPO MG5)

• Type: Synchromesh Transmission Fluid (GM Part No. U.S. 12345349, in Canada 10953465).

Manual Transmission (6–Speed)

• Type: Synthetic Transmission Fluid approved to Allison Transmission® specification TES-295 (GM Part No. U.S.12378515, in Canada 88900701)

Automatic Transmission

• Type: DEXRON®-III Automatic Transmission Fluid. Look for “Approved for the H-Specifification” on the label.

Key Lock Cylinders

• Type: Multi-Purpose Lubricant, Superlube (GM Part No. 12346241, in Canada 10953474).

Floor Shift Linkage

• Type: Lubriplate Lubricant Aerosol (GM Part No. U.S. 12346293, in Canada 992723) or lubricant meeting requirements of NLGI #2 Category LB or GC-LB.

Parking Brake Cable Guides

• Type: Chassis Lubricant (GM Part No. U.S. 12377985, in Canada 88901242) or lubricant meeting requirements of NLGI #2, Category LB or GC-LB.

Automatic Transmission

• Type: DEXRON®-VI Automatic Transmission Fluid.

Chassis Lubrication

• Type: Chassis Lubricant(GM Part No. U.S. 12377985, in Canada 88901242) or lubricant meeting requirements of NLGI #2, Category LB or GC-LB.

Front and Rear Axle

• Type: SAE 80W-90 Axle Lubricant (GM Part No. U.S. 1052271, in Canada 10950849)

Rear Axle

• Type: SAE 75W-90 Synthetic Axle Lubricant (GM Part No. U.S. 12378261, in Canada 10953455) meeting GM Specification 9986115

Rear Axle (Steerable)

• Type: Synthetic Axle Lubricant; use only GM Part No. U.S. 12378557, in Canada 88901362. Do not add a friction modifier

Manual Transfer Case

• Type: DEXRON®-III Automatic Transmission Fluid. Look for “Approved for the H-Specifification” on the label.

Automatic Transfer Case

• Type: AUTO-TRAK II Fluid (GM Part No. U.S. 12378508, in Canada 10953626)

Front Axle Propshaft Spline or One-Piece Propshaft Spline (Two-Wheel Drive with Auto. Trans.)

• Type: Spline Lubricant, Special Lubricant (GM Part No. U.S. 12345879, in Canada 10953511) or lubricant meeting requirements of GM 9985830.

Rear Driveline Center Spline

• Type: Chassis Lubricant (GM Part No. U.S. 12377985, in Canada 88901242) or lubricant meeting requirements of NLGI #2, Category LB or GC-LB.

Hood Hinges

• Type: Multi-Purpose Lubricant, Superlube (GM Part No. U.S. 12346241, in Canada 10953474)

Body Door Hinge Pins, Tailgate Hinge and Linkage, Folding Seats, and Fuel Door Hinge

• Type: Multi-Purpose Lubricant, Superlube (GM Part No. U.S. 12346241, in  Canada 10953474)

Tailgate Handle Pivot Points, Hinges, Latch Bolt, and Linkage

• Type: Multi-Purpose Lubricant, Superlube GM Part No. U.S. 12346241, in Canada 10953474).

Weatherstrip Conditioning

• Type: Weatherstrip Lubricant (GM Part No. U.S. 3634770, in Canada 10953518) or Dielectric Silicone Grease (GM Part No. U.S. 12345579, in Canada 992887).

Weatherstrip Squeaks

• Type: Synthetic Grease with Teflon, Superlube   (GM Part No. U.S. 12371287, in Canada 10953437).

Powertrain

Engine

• 4.3 L V6 195 hp (145 kW)[15][16]
• 4.8 L V8 295 hp (220 kW)[15]
• 5.3 L V8 315 hp (235 kW)[15]
• 6.0 L V8 367 hp (274 kW)[15] (2007–2009)
• 6.2 L V8 403 hp (301 kW)[15] (2009–2013)

Transmission

• 4-speed 4L60-E automatic
• 4-speed “2-Mode Hybrid transmission” 2ML70 (Hybrid)
• 6-speed manual (Mexico only)
• 6-speed 6L80 automatic

Fuel Consumption

Safety Ratings

Front Lights

• Daytime Running Light Bulb:
  • 3157-SCK
  •  4114K
• Front Fog Light Bulb: 9145
• Front Sidemarker Light Bulb: 194
• Front Turn Signal Light Bulb:
  • 3157-SCK
  • 4157NAK
• High Beam Headlight Bulb: 9005
• Low Beam Headlight Bulb: 9006

Rear Lights

• Back Up Light Bulb: 3
  • 157-SCK
  • 3157K
• Brake Light Bulb
  • 3157-SCK
  • 3157K
• Center High Mount Stop Light Bulb: 921
• License Plate Light Bulb: 194
• Parking Light Bulb:
  • 3157-SCK,
  • 4157NAK
• Rear Sidemarker Light Bulb: 194
• Rear Turn Signal Light Bulb:
  • 3157-SCK
  •  3157K
• Tail Light Bulb:
  • 3157-SCK
  •  3157K
• Tailgate Light Bars: vbf-tailgate-light

Interior Lights

• Courtesy Light Bulb:
  • 194
  • 74
• Dome Light Bulb:
  • 211-2
  •  578
• Glove Box Light Bulb: 194
• Luggage Compartment Light Bulb: 912
• Map Light Bulb: 578