GMCSierra 15001999 · Second generation

1999 GMC Sierra 1500 Engine

4300 Vortec 4300-vortec
Engines: LR4 lr4
Engine 2

Lowest stored HP200 hp — 8 configurations tie for lowest
Highest stored HP255 hp — 12 configurations tie for highest
Lowest stored torque260 lb-ft — 8 configurations tie for lowest
Highest stored torque285 lb-ft — 16 configurations tie for highest

Catalog dataManufacturer figures stored on configuration rows

Engine / configuration

4300 Vortec · 4300-vortec

Catalog engines

Engine	Code
4300 Vortec	4300-vortec
LR4	lr4

Configurations

Configuration	HP	Torque
SL 4x4 Extended Cab 6.5 ft. box	255 hp	285 lb-ft
SL 4x4 Extended Cab 8 ft. box	255 hp	285 lb-ft
SLE 4x4 Extended Cab 6.5 ft. box	255 hp	285 lb-ft
SLE 4x4 Extended Cab 8 ft. box	255 hp	285 lb-ft
SLT 4x4 Extended Cab 6.5 ft. box	255 hp	285 lb-ft
SLT 4x4 Extended Cab 8 ft. box	255 hp	285 lb-ft
SL 4x2 Extended Cab 6.5 ft. box	255 hp	285 lb-ft
SL 4x2 Extended Cab 8 ft. box	255 hp	285 lb-ft
SLE 4x2 Extended Cab 6.5 ft. box	255 hp	285 lb-ft
SLE 4x2 Extended Cab 8 ft. box	255 hp	285 lb-ft
SLT 4x2 Extended Cab 6.5 ft. box	255 hp	285 lb-ft
SLT 4x2 Extended Cab 8 ft. box	255 hp	285 lb-ft
SLE 4x2 Extended Cab 141.5 in. WB	230 hp	285 lb-ft
SLE 4x4 Extended Cab 141.5 in. WB	230 hp	285 lb-ft
SLT 4x2 Extended Cab 141.5 in. WB	230 hp	285 lb-ft
SLT 4x4 Extended Cab 141.5 in. WB	230 hp	285 lb-ft
SL 4x4 Standard Cab 6.5 ft. box	200 hp	260 lb-ft
SL 4x4 Standard Cab 8 ft. box	200 hp	260 lb-ft
SLE 4x4 Standard Cab 6.5 ft. box	200 hp	260 lb-ft
SLE 4x4 Standard Cab 8 ft. box	200 hp	260 lb-ft
SL 4x2 Standard Cab 6.5 ft. box	200 hp	260 lb-ft
SL 4x2 Standard Cab 8 ft. box	200 hp	260 lb-ft
SLE 4x2 Standard Cab 6.5 ft. box	200 hp	260 lb-ft
SLE 4x2 Standard Cab 8 ft. box	200 hp	260 lb-ft

Compare two configurations

Catalog spark plugs

Catalog year/make/model rows for 1999 GMC Sierra 1500.

Accel

HP Copper Spark Plug - 14mm Thread - .708 in Reach - Tapered Seat - 4 Pack, 0526-4

MPN: 0526-4

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Accel

Spark Plug Wire Set - Extreme 9000 Black Ceramic Boot - Chevy/GMC Truck 4.3L V6 - This custom fit black ceramic boot spark plug wire set fits.

MPN: 9044CK

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ACDelco

Conventional Spark Plug, R44LTS6

MPN: R44LTS6

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ACDelco

Iridium Spark Plug, 41-101

MPN: 41-101

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Catalog engine codes and configuration engine labels do not always match. Both are shown as stored — neither is rewritten.

Catalog fitment does not by itself prove OEM-equivalent compatibility.