Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 586 (MAINTENANCE AND LUBRICATION)SPECIFICATIONSFLUID AND LUBRICANT RECOMMENDATIONS
1999 GMC Forward Control 5.7 R, Automatic
Fluid and Lubricant Recommendations
1999 GMC Forward Control 5.7 R, AutomaticSECTION Fluid and Lubricant Recommendations
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Fluid and Lubricant Recommendations
| Application | Fluid/Lubricant |
|---|---|
| Automatic Transaxle | DEXTRON® III Automatic Transmission Fluid |
| Carrier Assembly-Differential, Rear Drive Module and Transfer Case Power Transfer Unit | VersaTrak Fluid GM P/N US 12378514 (Canadian P/N 88901045) |
| Engine Coolant | 50/50 mixture of clean, drinkable water and DEX-COOL® coolant. |
| Engine Oil | Engine oil with the American Petroleum Institute Certified for Gasoline Engines Starburst symbol. |
| Hinges Hood and Door | Multi-Purpose Lubricant, Superlube GM P/N US 12346241 (Canadian P/N 10953474) or equivalent. |
| Hood Latch Assembly, Secondary Latch, Pivots, Spring Anchor and Release Pawl | Lubriplate Lubricant Aerosol GM P/N 12346293 (Canadian P/N 992723) or equivalent or lubricant meeting requirements of NLGI#2, Category LB or GC-LB. |
| Hydraulic Brake System | Delco® Supreme II Brake Fluid or equivalent DOT P/N 3 Brake Fluid |
| Key Lock Cylinders | Multi-Purpose Lubricant, Superlube GM P/N US 12346241 (Canadian P/N 993294) or equivalent. |
| Power Steering System | GM Power Steering Fluid GM P/N US 1052884 (Canadian P/N 993294) or equivalent. |
| Weatherstrip Conditioning | Dielectric Silicone Grease GM P/N US 12345579 (Canadian P/N 1974984) or equivalent. |
| Windshield Washer Solvent | GM Optikleen Washer Solvent or equivalent |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.