5.3L Vortec Horsepower & Torque by Year: Complete Chart (1999-2026)
Quick Answer: The 5.3 Vortec made 270 hp in 1999 and 295 hp by 2004. Silverado pickups made 315 to 320 hp from 2007 to 2013. The EcoTec3 version has made 355 hp and 383 lb-ft since 2014.
These 5.3 Vortec horsepower by year figures show how GM’s small-block truck V8 grew from 270 hp in 1999 to 355 hp today. Torque rose from 315 lb-ft to 383 lb-ft over the same period.
Ratings changed with each engine family, not each model year. The chart below groups Silverado ratings by engine code, and later sections explain the Gen III, Gen IV, and EcoTec3 steps.
Not sure which engine you have? Our 5.3 Vortec engine diagram shows how the engine families differ.
5.3 Vortec Horsepower by Year Chart for 1999 to 2026
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This chart lists the 5.3L V8 as sold in the Chevrolet Silverado 1500. Each row shows the year range, engine code, horsepower, and torque.
5.3L V8 Horsepower and Torque by Year
Silverado 1500 pickup, gasoline ratings by engine code.
| Model Years | Engine Code | Horsepower | Torque |
|---|---|---|---|
| 1999 | LM7 | 270 hp | 315 lb-ft |
| 2000 to 2003 | LM7 | 285 hp | 325 lb-ft |
| 2004 to 2007 | LM7 | 295 hp | 335 lb-ft |
| 2005 to 2007 | L33 | 310 hp | 335 lb-ft |
| 2007 to 2009 | LY5 | 315 to 320 hp | 335 to 340 lb-ft |
| 2010 to 2013 | LMG, LC9 | 315 hp | 335 lb-ft |
| 2014 to 2018 | L83 | 355 hp | 383 lb-ft |
| 2019 to 2026 | L84 | 355 hp | 383 lb-ft |
The L33 was limited to extended-cab, standard-bed 4WD pickups. Both the LM7 and LY5 appear in 2007 trucks. E85 and SUV ratings differ from these figures.
KBB lists the 2012 Silverado 1500 5.3L at 315 hp at 5,200 rpm and 335 lb-ft. Our sources show the same engine family from 2010 to 2013, but only 2012 was checked directly.
Gen III 5.3 Vortec Ratings from 1999 to 2007
LM7 Ratings by Year
Wikipedia’s LS engine tables list the LM7 at 270 hp and 315 lb-ft in 1999. The rating rose to 285 hp and 325 lb-ft for 2000 to 2003, then 295 hp and 335 lb-ft for 2004 to 2007.
The L59 is the flex-fuel version of the LM7. The same source lists it at 285 hp and 320 lb-ft in 2002 and 2003, then 295 hp and 335 lb-ft from 2004 to 2007.
The aluminum-block LM4 is rated at 290 hp and 325 lb-ft for 2003 and 2004.
L33 High Output Version
Chevytrucks.org’s engine guide lists the L33 at 310 hp and 335 lb-ft, and the Wikipedia tables agree. It ran from 2005 to 2007.
The L33 was limited to extended-cab, standard-bed 4WD pickups. Wikipedia says only a quarter of 2005 full-size Chevrolet and GMC pickups had it.
Gen IV 5.3 Vortec Ratings from 2007 to 2013
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LY5 and LMG Pickup Ratings
The LY5 replaced the LM7 in 2007. Wikipedia lists pickup ratings of 315 to 320 hp and 335 to 340 lb-ft for 2007 to 2009. Peak power comes at 5,200 rpm and peak torque at 4,000 rpm.
The LMG is the flex-fuel version, and the same source says its ratings match each application’s LY5 rating. Variable valve timing arrived for 2010, and Active Fuel Management was standard.
LC9 and E85 Ratings
Wikipedia lists the LC9 pickup at 315 hp and 335 lb-ft. GM Authority lists the LC9 in the Suburban and Yukon XL at 320 hp and 335 lb-ft on regular fuel. On E85 it lists 326 hp and 348 lb-ft.
EcoTec3 5.3 Ratings from 2014 to 2026
GM launched the 5.3L EcoTec3 for 2014, and many owners still call it a Vortec. Equipment World’s coverage of GM’s launch lists it at 355 hp and 383 lb-ft, SAE certified.
The same coverage names three technologies: direct injection, cylinder deactivation, and continuously variable valve timing. GM Authority lists the L83 for 2014 to 2018 Silverado and Sierra at the same figures. Its E85 rating is 380 hp and 416 lb-ft.
The L84 took over from 2019 in the Silverado and Sierra, with 355 hp at 5,600 rpm and 383 lb-ft at 4,100 rpm. It reached the Tahoe, Suburban, and Yukon for 2021.
For 2026, a dealer spec sheet for the Silverado 1500 LTZ lists the same 355 hp and 383 lb-ft. That is a dealer listing, so check the window sticker.
For the deeper numbers on this engine, see our GM 5.3L L84 engine specs guide.
Why Published 5.3 Vortec Horsepower Numbers Disagree
Three patterns explain most conflicts between websites:
- Vehicle: GM Authority lists the LMG at 320 hp in the Tahoe and 310 hp in the Yukon, both with 335 lb-ft.
- Fuel: E85 ratings run higher than gasoline ratings, so a flex-fuel figure can look like a power gain.
- Variant: The L33 made 310 hp while the LM7 made 295 hp in the same years.
Match the engine code and vehicle before you trust any single number.
How to Confirm Your 5.3 Engine Code
Wikipedia lists a VIN engine letter for each engine. Examples are T for the LM7, B for the L33, J for the LY5, and 0 for the LMG.
Which 5.3 Vortec Rating Applies to Your Truck
Use these 5.3 Vortec horsepower by year ratings to match your truck to the right engine family. Gen III engines made 270 to 310 hp from 1999 to 2007. Gen IV Silverado pickups made 315 to 320 hp from 2007 to 2013. The chart above gives a quick match.
The EcoTec3 engine has made 355 hp and 383 lb-ft since 2014. Ratings shift with engine code, vehicle, and fuel, so confirm your VIN letter first. Treat your window sticker as the final word when a website disagrees. If you are shopping used, read our 5.3 Vortec problems guide to see how each generation holds up.
Frequently Asked Questions About 5.3 Vortec Horsepower
How Much Horsepower Does a 5.3 Make
It depends on the year. The LM7 made 270 to 295 hp from 1999 to 2007. Gen IV Silverado pickups made 315 to 320 hp until 2013. The EcoTec3 has made 355 hp since 2014.
What Is the 5.3 Vortec L33
The L33 is the high-output Gen III 5.3. It made 310 hp and 335 lb-ft from 2005 to 2007. It was limited to extended-cab, standard-bed 4WD pickups.
Did the 5.3 Gain Power in 2014
Yes. The 2014 EcoTec3 raised output to 355 hp and 383 lb-ft, up from 315 hp and 335 lb-ft in the 2012 Silverado. It brought direct injection to the 5.3 alongside cylinder deactivation and variable valve timing.
Does E85 Change 5.3 Horsepower
Yes. GM Authority lists the L83 at 355 hp on gas and 380 hp on E85. It lists the LC9 at 320 hp on gas and 326 hp on E85.
What Is the 2026 5.3 Horsepower
A dealer sheet for the 2026 Silverado 1500 lists the L84 at 355 hp at 5,600 rpm and 383 lb-ft at 4,100 rpm. Confirm against your window sticker.
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