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1999-2007 Chevy Silverado/GMC Sierra Pickup Truck and Related SUV Routine Maintenance FAQ

Chevy Silverado

Modern vehicles need much less maintenance than the vehicles of 25 years ago, but they still need fluid changes, inspections, and adjustments. You no longer need to do a tune-up every six months or change the oil every three months, but regular service and check-ups are still essential to your vehicle’s longevity. What follows is our quick reference guide for the 1999-2006 Chevy Silverado/GMC Sierra pickup trucks (and 2007 Silverado/Sierra Classic), plus Avalanche, Tahoe, Suburban, and Yukon SUVs, taken directly from Haynes manual 24066.

Most of these recommended routine maintenance tasks you can do yourself at home for practically no money, as long as you have a few simple tools and the time to invest. If you need more guidance, or even step by step instructions and a video demonstration, get the online manual, or our traditional printed manual.

Oil Change

Oil type API “certified for gasoline engines”
Oil viscosity SAE 5w-30 all temperatures
  SAE 10w-30 temperatures above 0 degrees F
Oil capacity(including filter)  
V6 engine 4.5 quarts
V8 engine 6.0 quarts
Recommended fastener torque  
Engine oil drain plug 18 ft-lbs

Transmission Fluid Change

Automatic transmission fluid type  
1999-2005 DEXRON III automatic transmission fluid
2006-2007 DEXRON VI automatic transmission fluid
Manual transmission lube type Synchromesh transmission fluid or equivalent
NV 4500 Syn-torq synthetic transmission fluid or equivalent
ZF S6-650 Trans-Synd synthetic transmission fluid or equivalent
Automatic transmission fluid capacity  
Fluid and filter change  
   4L60-E/4L65-E 5.0 quarts
   4L80-E/4L85-E 7.7 quarts
From dry, including torque converter  
   4L60-E/4L65-E 11.2 quarts
   4L80-E/4L85-E 13.5 quarts
Manual transmission lube capacity  
New Venture 3500 2.2 quarts
New Venture 4500 4.0 quarts
ZF S6-650 6.3 quarts
Recommended fastener torque  
Automatic transmission  
   Pan bolts 97 in-lbs
   Drain plug 156 in-lbs
   Pan bolts  
      2004 and 2005 models 18 ft-lbs
      All others 97 in-lbs
   Drain plug 156 in-lbs
Manual transmission fill and drain plugs  
New Venture 3500 22 ft-lbs
New Venture 4500 27 ft-lbs
ZF S6-650 26 ft-lbs

Transfer Case and Differential Fluid Change

Manual transfer case fluid type  
New Venture 261 NP2 DEXRON III automatic transmission fluid (2006 and later models require DEXRON VI)
Automatic transfer case fluid type  
New Venture 236 NP8, New Venture 246-NP8, GM Auto Trak II transfer case fluid
Others 1999-2005 DEXRON-III automatic transmission fluid
Others 2006-2007 DEXRON-VI automatic transmission fluid
Differential fluid type  
   Selectable 4WD SAE 80W90 GL-5 gear oil
   Full-time 4WD SAE 75W90 synthetic gear oil
Rear SAE 75W90 synthetic gear oil
Transfer case capacity  
New Venture 246-NP8  
   1999 through 2001 2.4 quarts
   2002 and later 2.0 quarts
New Venture 236-NP8 2.0 quarts
New Venture 149-NP 2.4 quarts
New Venture 263-NP1 2.0 quarts
New Venture 149-NP3 2.2 quarts
New Venture 261-NP2  
   1999 through 2001 2.3 quarts
   2002 and later 2.0 quarts
Borg Warner 4481-NR3 1.5 quarts
Borg Warner 4482-NR4 1.5 quarts
Recommended fastener torque  
Manual transmission fill and drain plugs  
   New Venture 3500 22 ft-lbs
   New Venture 4500 27 ft-lbs
   ZF S6-650 26 ft-lbs
Transfer case drain/fill plug 15 ft-lbs
Differential drain and fill plugs  
   Front differential 24 ft-lbs
   Rear differential  
     1999 45 ft-lbs
      2000 and 2001 24 ft-lbs
      2002 and later  
        Drain plug  
            9.75 inch ring gear 20 ft-lbs
            All except 9.75 inch ring gear 24 ft-lbs
         Fill plug  
            9.75 inch ring gear 15 ft-lbs
            All except 9.75 inch ring gear 24 ft-lbs

Cooling System Flush and Fill

Engine coolant type 50/50 mixture of DEX-COOL coolant and demineralized water
Cooling system capacity**  
V6 engine 13.0 qts
V8 engine  
   4.8L and 5.3L 16.7 qts
Yukon Denali, Yukon XL Denali 19.0 qts
All others 16.8 qts
** Cooling system capacities vary depending on engine/transmission package, radiator and A/C system type. Add coolant as necessary to bring to appropriate level.

Other Miscellaneous Fluid Types

Brake fluid type DOT 3 brake fluid
Clutch fluid type DOT 3 brake fluid
   5-speed transmission DOT 3 brake fluid
   6-speed transmission GM clutch hydraulic fluid
Power steering fluid GM power steering fluid

Other Miscellaneous Torque Specs

Spark plugs 132 in-lbs
Wheel lug nuts 140 ft-lbs
Brake caliper  
   Caliper mounting (guide pin) bolts  
         2005 1500 models 74 ft-lbs
         All others 80 ft-lbs
        1500 models 31 ft-lbs
         2500 models 80 ft-lbs
Caliper mounting bracket bolts  
      1500 models  
         1999-2004 129 ft-lbs
         2005 133 ft-lbs
      2500 models 221 ft-lbs
      1500 models 148 ft-lbs
      2500 models  
         1999-2002 128 ft-lbs
         2003 and later  
            JC3/JC5/JH2/JH5 calipers 148 ft-lbs
            JH6 calipers 122 ft-lbs
            JH7 calipers 221 ft-lbs
Chevy SIlverado rear cover

Maintenance Schedule

The following intervals are based on the assumption that you will be doing the service work yourself, as opposed to paying to have the work done. These are our recommended minimum maintenance intervals for vehicles that are driven daily, and in many cases are shorter than the factory’s recommendations. Because frequent maintenance enhances the efficiency, performance and resale value of your Jeep, we encourage you to follow our schedule. If you drive in dusty areas, tow a trailer, idle or drive at low speeds for extended periods, or drive for short periods (less than four miles at a time) in below freezing temperatures, even smaller intervals are recommended.

When the vehicle is new, follow the maintenance schedule to the letter, record it in your owner’s manual and keep all receipts to protect the warranty and resale value. In many cases the initial maintenance check is done by the dealer at no cost (check with the service department when you buy the truck for more information).

Every 250 miles or weekly, whichever comes first

  • Check the engine oil level
  • Check the coolant level
  • Check the windshield washer fluid level
  • Check the brake and clutch fluid levels
  • Check the tires and tire pressures ( Section 5 )

Every 3000 miles or 3 months, whichever comes first

All items listed above, plus . . . 

  • Check the power steering fluid level
  • Check the automatic transmission fluid level
  • Change the engine oil and filter

Every 6000 miles or 6 months, whichever comes first

All items listed above, plus . . . 

  • Check the seat belts
  • Inspect the windshield wiper blades
  • Check and service the battery
  • Check the engine drivebelt
  • Inspect underhood hoses
  • Check the cooling system
  • Rotate the tires
  • Check the lubricant level in the front (4x4) and rear axles

Every 15,000 miles or 12 months, whichever comes first

All items listed above, plus . . . 

  • Lubricate the chassis
  • Check the fuel system
  • Check the brake system*
  • Check the exhaust system
  • Check the manual transmission lubricant level
  • Check the transfer case lubricant level - 4WD
  • Replace the interior ventilation filter*

Every 30,000 miles or 30 months, whichever comes first

All items listed above, plus . . . 

  • Change the brake fluid
  • Replace the air filter*
  • Replace the fuel filter
  • Replace the spark plugs (conventional, non-platinum)**
  • Service the cooling system (drain, flush and refill) (green-colored ethylene glycol anti-freeze only)
  • Check the steering, suspension and driveaxle boots
  • Change the automatic transmission fluid and filter**

Every 60,000 miles or 48 months, whichever comes first

  • Change the manual transmission lubricant**
  • Change the transfer case lubricant**
  • Inspect the Exhaust Gas Recirculation (EGR) valve
  • Change the differential lubricant**
  • Replace the Positive Crankcase Ventilation (PCV) valve

Every 100,000 miles or 60 months, whichever comes first

  • Inspect/replace the spark plug wires
  • Replace the spark plugs (platinum type)
  • Service the cooling system (drain, flush and refill) (orange-colored DEX-COOL anti-freeze only)

* This item is affected by “severe” operating conditions as described below. If your vehicle is operated under severe conditions, perform these maintenance tasks at half the recommended intervals. Severe conditions include the following:

  • Operating in mostly dusty areas (dirt roads, or off-road)
  • Idling for extended periods and/or low speed operation
  • Mostly short trips (less than 4 miles) when outside temperatures remain below freezing

** If operated under one or more of the following conditions, perform these procedures at half the recommended interval

  • In heavy city traffic where the outside temperature is regularly above 90-degrees F (32-degrees C)
  • In hilly or mountainous terrain 
  • Frequent trailer towing 
  • Frequent off road use or if the vehicle is driven through water