Chevrolet Silverado
Engines

Model
Year
Engine
Power
Torque
1500
1998–2003
4.3 L Vortec 4300 V6
200 hp (149 kW) at 4600 rpm
260 lb⋅ft (353 N⋅m) at 2800 rpm
1500
2004–2006
4.3 L Vortec 4300 V6
195 hp (145 kW) at 4600 rpm
260 lb⋅ft (353 N⋅m) at 2800 rpm
1500
1998-1999
4.8 L Vortec 4800 V8
255 hp (190 kW) at 5200 rpm
285 lb⋅ft (386 N⋅m) at 4000 rpm
1500
2000-2003
4.8 L Vortec 4800 V8
270 hp (201 kW) at 5200 rpm
285 lb⋅ft (386 N⋅m) at 4000 rpm
1500
2004-2007
4.8 L Vortec 4800 V8
285 hp (213 kW) at 5200 rpm
295 lb⋅ft (400 N⋅m) at 4000 rpm
1500
1998-1999
5.3 L Vortec 5300 V8
270 hp (201 kW) at 5200 rpm
315 lb⋅ft (427 N⋅m) at 4000 rpm
1500
2000–2003
5.3 L Vortec 5300 V8
285 hp (213 kW) at 5200 rpm
325 lb⋅ft (441 N⋅m) at 4000 rpm
1500
2004–2007
5.3 L Vortec 5300 V8
295 hp (220 kW) at 5200 rpm
335 lb⋅ft (454 N⋅m) at 4000 rpm
1500
2005-2007
5.3 L Vortec 5300 V8
310 hp (231 kW) at 5200 rpm
335 lb-ft (454 N-m) at 4000 rpm
1500HD/2500HD/3500HD
2000-2006
6.0 L Vortec 6000 V8
300 hp (224 kW) @ 4400 RPM
360 lb⋅ft (488 N⋅m) @ 4000 RPM
1500HD/2500HD/3500HD
2001–2003
8.1 L Vortec 8100 V8
340 hp (254 kW) @ 4200 RPM
455 lb⋅ft (617 N⋅m) @ 3200 RPM
1500HD/2500HD/3500HD
2004–2006
8.1 L Vortec 8100 V8
330 hp (246 kW) @ 4200 RPM
450 lb⋅ft (610 N⋅m) @ 3200 RPM
1500HD/2500HD/3500HD
2001–2002 w/ LQY
8.1 L Vortec 8100 V8
270 hp (201 kW) @ 3600 RPM
400 lb⋅ft (542 N⋅m) @ 1600 RPM
1500HD/2500HD/3500HD
2001–2002 w/ LQQ
8.1 L Vortec 8100 V8
210 hp (157 kW) @ 3600 RPM
325 lb⋅ft (441 N⋅m) @ 1200 RPM
1500HD/2500HD/3500HD
2002–2005 w/ LRW
8.1 L Vortec 8100 V8
325 hp (242 kW) @ 4000 RPM
450 lb⋅ft (610 N⋅m) @ 2800 RPM
1500HD/2500HD/3500HD
2002–2006 w/ LRZ
8.1 L Vortec 8100 V8
295 hp (220 kW) @ 3600 RPM
440 lb⋅ft (597 N⋅m) @ 3200 RPM
1500HD/2500HD/3500HD
2002–2006 w/ LQR
8.1 L Vortec 8100 V8
225 hp (168 kW) @ 3600 RPM
350 lb⋅ft (475 N⋅m) @ 1200 RPM
1500HD/2500HD/3500HD
2000–2004
6.6 L Duramax (LB7/LLY) V8
300 hp (224 kW) @ 3100 RPM
520 lb⋅ft (705 N⋅m) @ 1800 RPM
1500HD/2500HD/3500HD
2005-2006 w/ MTX
6.6 L Duramax (LB7/LLY) V8
300 hp (224 kW) @ 3000 RPM
520 lb⋅ft (705 N⋅m) @ 1800 RPM
1500HD/2500HD/3500HD
2005-2006 w/ ATX
6.6 L Duramax (LB7/LLY) V8
310 hp (231 kW) @ 3000 RPM
605 lb⋅ft (820 N⋅m) @ 1600 RPM
1500HD/2500HD/3500HD
2006-2007
6.6 L Duramax (LBZ) V8
360 hp (268 kW) @ 3200 RPM
650 lb⋅ft (881 N⋅m) @ 1600 RPM
GMC Sierra C3
2000-2001
6.0 L Vortec 6000 V8
325 hp (242 kW) @ 5000 RPM
370 lb⋅ft (502 N⋅m) @ 4000 RPM
GMC Sierra Denali
2002–2004
6.0 L Vortec 6000 V8
325 hp (242 kW) @ 5000 RPM
370 lb⋅ft (502 N⋅m) @ 4000 RPM
GMC Sierra Denali
2004–2006
6.0 L Vortec 6000 V8
345 hp (257 kW) @ 5200 RPM
380 lb⋅ft (515 N⋅m) @ 4000 RPM
Chevrolet Silverado SS
2002–2006
6.0 L Vortec 6000 V8
345 hp (257 kW) @ 5200 RPM
380 lb⋅ft (515 N⋅m) @ 4000 RPM
Chevrolet Silverado Vortec High Output
2003–2005
6.0 L Vortec 6000 V8
345 hp (257 kW) @ 5200 RPM
380 lb⋅ft (515 N⋅m) @ 4000 RPM
Chevrolet Silverado VortecMAX
2005-2006
6.0 L Vortec 6000 V8
345 hp (257 kW) @ 5200 RPM
380 lb⋅ft (515 N⋅m) @ 4000 RPM

Question: What model was rated at 345 hp?
Answer: The SS models was rated at 345 hp (257 kW) at 5200 rpm, and 380 lb⋅ft (515 N⋅m) of torque at 4000 rpm.