1999 GMC Sierra 2500
6 trims · 18 configurations · Truck (Regular Cab), Truck (Extended Cab)
Starting MSRP
$0
No live listings right now
Manufacturer specs and trim data below are still available for research. Check back for dealer inventory, or browse other GMC models.
Shop GMC inventoryPricing
How much should you pay for the GMC Sierra 2500? Select a trim to update purchase and lease estimates.
MSRP by trim
Select a trim to update the payment estimates. MSRP is for each trim's base configuration and excludes destination, taxes, and options.
Purchase information
Based on HD SL
Total price (HD SL MSRP)
$0
Typical monthly
$0/mo
Avg. APR
7.00%
60-month loan estimate for good credit (rates as of 2026-07-12). Not a credit offer; actual APR varies by lender, credit, and dealer.
Open loan calculatorCompare 1999 GMC Sierra 2500 trims
HD SL
5 configurations
- MSRP
- $0
- Fuel economy (city/hwy)
- —
- Horsepower
- 300 hp
- Torque
- 355 lb-ft
- Engine
- 6L V8 gas
- Seating
- —
- Drivetrain
- RWD
- Cargo (cu ft)
- —
- Max towing
- 7,500 lbs
HD SLE
5 configurations
- MSRP
- $0
- Fuel economy (city/hwy)
- —
- Horsepower
- 300 hp
- Torque
- 355 lb-ft
- Engine
- 6L V8 gas
- Seating
- —
- Drivetrain
- RWD
- Cargo (cu ft)
- —
- Max towing
- 7,500 lbs
HD SLT
3 configurations
- MSRP
- $0
- Fuel economy (city/hwy)
- 11/15
- Horsepower
- 300 hp
- Torque
- 355 lb-ft
- Engine
- 6L V8 gas
- Seating
- —
- Drivetrain
- RWD
- Cargo (cu ft)
- —
- Max towing
- 7,500 lbs
SL
2 configurations
- MSRP
- $0
- Fuel economy (city/hwy)
- 14/18
- Horsepower
- 270 hp
- Torque
- 315 lb-ft
- Engine
- 5.3L V8 gas
- Seating
- —
- Drivetrain
- RWD
- Cargo (cu ft)
- —
- Max towing
- 6,500 lbs
SLE
2 configurations
- MSRP
- $0
- Fuel economy (city/hwy)
- 14/18
- Horsepower
- 270 hp
- Torque
- 315 lb-ft
- Engine
- 5.3L V8 gas
- Seating
- —
- Drivetrain
- RWD
- Cargo (cu ft)
- —
- Max towing
- 6,500 lbs
SLT
- MSRP
- $0
- Fuel economy (city/hwy)
- 14/18
- Horsepower
- 270 hp
- Torque
- 315 lb-ft
- Engine
- 5.3L V8 gas
- Seating
- —
- Drivetrain
- RWD
- Cargo (cu ft)
- —
- Max towing
- 6,500 lbs
| Spec | HD SL5 configurations | HD SLE5 configurations | HD SLT3 configurations | SL2 configurations | SLE2 configurations | SLT |
|---|---|---|---|---|---|---|
| MSRP | $0 | $0 | $0 | $0 | $0 | $0 |
| Fuel economy (city/hwy) | — | — | 11/15 | 14/18 | 14/18 | 14/18 |
| Horsepower | 300 hp | 300 hp | 300 hp | 270 hp | 270 hp | 270 hp |
| Torque | 355 lb-ft | 355 lb-ft | 355 lb-ft | 315 lb-ft | 315 lb-ft | 315 lb-ft |
| Engine | 6L V8 gas | 6L V8 gas | 6L V8 gas | 5.3L V8 gas | 5.3L V8 gas | 5.3L V8 gas |
| Seating | — | — | — | — | — | — |
| Drivetrain | RWD | RWD | RWD | RWD | RWD | RWD |
| Cargo (cu ft) | — | — | — | — | — | — |
| Max towing | 7,500 lbs | 7,500 lbs | 7,500 lbs | 6,500 lbs | 6,500 lbs | 6,500 lbs |
Specifications shown for each trim’s base configuration; drivetrain, cab, and box options vary within a trim, and MSRP shows the full range. MSRP excludes destination fees, taxes, and dealer-installed options.
Full specifications
Shown for each trim's base configuration. Drivetrain, cab, and box options within a trim can change dimensions, capacities, and fuel economy.
Engine & drivetrain
- Engine type
- HD SLgasHD SLEgasHD SLTgasSLgasSLEgasSLTgas
- Fuel type
- HD SLregular unleadedHD SLEregular unleadedHD SLTregular unleadedSLregular unleadedSLEregular unleadedSLTregular unleaded
- Cylinders
- HD SLV8HD SLEV8HD SLTV8SLV8SLEV8SLTV8
- Displacement
- HD SL6 LHD SLE6 LHD SLT6 LSL5.3 LSLE5.3 LSLT5.3 L
- Horsepower
- HD SL300 hpHD SLE300 hpHD SLT300 hpSL270 hpSLE270 hpSLT270 hp
- Torque
- HD SL355 lb-ftHD SLE355 lb-ftHD SLT355 lb-ftSL315 lb-ftSLE315 lb-ftSLT315 lb-ft
- Transmission
- HD SL5-speed manualHD SLE5-speed manualHD SLT4-speed automaticSL—SLE—SLT4-speed automatic
- Drivetrain
- HD SLrear wheel driveHD SLErear wheel driveHD SLTrear wheel driveSLrear wheel driveSLErear wheel driveSLTrear wheel drive
Dimensions
- Body type
- HD SLTruck (Regular Cab)HD SLETruck (Regular Cab)HD SLTTruck (Extended Cab)SLTruck (Regular Cab)SLETruck (Regular Cab)SLTTruck (Extended Cab)
- Doors
- HD SL2HD SLE2HD SLT3SL2SLE2SLT3
- Length
- HD SL221.9 inHD SLE221.9 inHD SLT246.4 inSL221.9 inSLE221.9 inSLT227.5 in
- Width
- HD SL78.5 inHD SLE78.5 inHD SLT78.5 inSL78.5 inSLE78.5 inSLT78.5 in
- Height
- HD SL71 inHD SLE71 inHD SLT70.8 inSL71 inSLE71 inSLT71.2 in
- Wheelbase
- HD SL133 inHD SLE133 inHD SLT157.5 inSL133 inSLE133 inSLT143.5 in
Capacity & weight
- Max towing
- HD SL7,500 lbsHD SLE7,500 lbsHD SLT7,500 lbsSL6,500 lbsSLE6,500 lbsSLT6,500 lbs
- Max payload
- HD SL2,614 lbsHD SLE2,614 lbsHD SLT1,883 lbsSL2,614 lbsSLE2,614 lbsSLT2,434 lbs
- Curb weight
- HD SL4,586 lbsHD SLE4,586 lbsHD SLT—SL4,586 lbsSLE4,586 lbsSLT—
- Fuel tank
- HD SL34 galHD SLE34 galHD SLT34 galSL34 galSLE34 galSLT26 gal
Fuel economy & EV
- Combined MPG
- HD SL—HD SLE—HD SLT12SL15SLE15SLT15
- City MPG
- HD SL—HD SLE—HD SLT11SL14SLE14SLT14
- Highway MPG
- HD SL—HD SLE—HD SLT15SL18SLE18SLT18
| Spec | HD SL | HD SLE | HD SLT | SL | SLE | SLT |
|---|---|---|---|---|---|---|
| Engine & drivetrain | ||||||
| Engine type | gas | gas | gas | gas | gas | gas |
| Fuel type | regular unleaded | regular unleaded | regular unleaded | regular unleaded | regular unleaded | regular unleaded |
| Cylinders | V8 | V8 | V8 | V8 | V8 | V8 |
| Displacement | 6 L | 6 L | 6 L | 5.3 L | 5.3 L | 5.3 L |
| Horsepower | 300 hp | 300 hp | 300 hp | 270 hp | 270 hp | 270 hp |
| Torque | 355 lb-ft | 355 lb-ft | 355 lb-ft | 315 lb-ft | 315 lb-ft | 315 lb-ft |
| Transmission | 5-speed manual | 5-speed manual | 4-speed automatic | — | — | 4-speed automatic |
| Drivetrain | rear wheel drive | rear wheel drive | rear wheel drive | rear wheel drive | rear wheel drive | rear wheel drive |
| Dimensions | ||||||
| Body type | Truck (Regular Cab) | Truck (Regular Cab) | Truck (Extended Cab) | Truck (Regular Cab) | Truck (Regular Cab) | Truck (Extended Cab) |
| Doors | 2 | 2 | 3 | 2 | 2 | 3 |
| Length | 221.9 in | 221.9 in | 246.4 in | 221.9 in | 221.9 in | 227.5 in |
| Width | 78.5 in | 78.5 in | 78.5 in | 78.5 in | 78.5 in | 78.5 in |
| Height | 71 in | 71 in | 70.8 in | 71 in | 71 in | 71.2 in |
| Wheelbase | 133 in | 133 in | 157.5 in | 133 in | 133 in | 143.5 in |
| Capacity & weight | ||||||
| Max towing | 7,500 lbs | 7,500 lbs | 7,500 lbs | 6,500 lbs | 6,500 lbs | 6,500 lbs |
| Max payload | 2,614 lbs | 2,614 lbs | 1,883 lbs | 2,614 lbs | 2,614 lbs | 2,434 lbs |
| Curb weight | 4,586 lbs | 4,586 lbs | — | 4,586 lbs | 4,586 lbs | — |
| Fuel tank | 34 gal | 34 gal | 34 gal | 34 gal | 34 gal | 26 gal |
| Fuel economy & EV | ||||||
| Combined MPG | — | — | 12 | 15 | 15 | 15 |
| City MPG | — | — | 11 | 14 | 14 | 14 |
| Highway MPG | — | — | 15 | 18 | 18 | 18 |