General Motors Atlas engine

2006 LL8 (Vortec 4200) engine in 2006 Chevrolet Trailblazer

The LL8 (or Vortec 4200), is a straight-6 gasoline engine produced between 2002 and 2009. It was the first Atlas engine, and was introduced in 2002 for the Chevrolet TrailBlazer, GMC Envoy, and Oldsmobile Bravada, the engine is also in use in the Buick Rainier, Saab 9-7X, and the Isuzu Ascender. It displaces 4.2 L; 253.9 cu in (4,160 cc),[4] with a 93 mm × 102 mm (3.66 in × 4.02 in) bore and stroke. It has four valves per cylinder, utilizes dual-overhead cams (DOHC) design, and features variable valve timing on the exhaust cam, a first for GM Inline engines. When introduced, this engine's power was 270 hp (201 kW) at 6000 rpm and torque was 275 lb⋅ft (373 N⋅m) at 3600 rpm. 2003 saw a slight bump in power to 275 hp (205 kW), while torque was unchanged. For 2006, power was increased to 291 hp (217 kW) at 6000 rpm and torque to 277 lb⋅ft (376 N⋅m)) at 4800 rpm with the addition of a MAF and a complete internal redesign of the engine; however due to the new SAE rating procedures ratings can vary slightly between years. Engine redline is 6300 rpm. The LL8 was on the Ward's 10 Best Engines list for 2002 through 2005 and was the basis for all the other Atlas engines. With the closing of the Moraine, Ohio plant and the termination of the GMT360 platform (Chevrolet TrailBlazer, GMC Envoy, etc.) the production of the LL8 was also terminated.[5]

Applications:

• 2002–2009 GMC Envoy, Envoy XL, and Envoy XUV
• 2002–2009 Chevrolet TrailBlazer and TrailBlazer EXT
• 2002–2004 Oldsmobile Bravada
• 2004–2007 Buick Rainier
• 2003–2008 Isuzu Ascender
• 2005–2009 Saab 9-7X 4.2i

GMC Canyon Vortec 3500 engine

The L52 (also called Vortec 3500), is a straight-5 DOHC engine produced between 2004 and 2006. It displaces 3.5 L; 211.1 cu in (3,460 cc), with a 93 mm × 102 mm (3.66 in × 4.02 in) bore and stroke. Dynoed at the flywheel it produces 220 hp (164 kW) at 5600 rpm and 225 lb⋅ft (305 N⋅m) at 2800 rpm. Engine redline is 6300 rpm.[6]

Applications:

• 2002 Bel Air concept
• 2004–2006 Chevrolet Colorado
• 2004–2006 GMC Canyon
• 2006 Isuzu i-350
• 2006 Hummer H3

The LLR (also called Vortec 3700), is a straight-5 DOHC engine with dual balance shafts[7] produced between 2007 and 2012. It displaces 3.7 L; 222.9 cu in (3,653 cc), courtesy of a larger 95.5 mm (3.76 in) bore while keeping the 102 mm (4.02 in) stroke. The LLR also corrected the head issue found in the L52. It produces 242 hp (180 kW) at 5600 rpm and 242 lb⋅ft (328 N⋅m) at 4600 rpm. Engine redline is 6300 rpm.[8] This five-cylinder motor achieves better fuel economy and performance than the six cylinder, but with more power and torque than the four cylinder. [9]

Applications:

• 2007–2012 Chevrolet Colorado
• 2007–2012 GMC Canyon
• 2007–2010 Hummer H3
• 2007–2008 Isuzu i-370

The LK5 (also called the Vortec 2800) is a 2.8 L; 169.0 cu in (2,770 cc) straight-4 DOHC engine produced between 2004 and 2006, with a 93 mm × 102 mm (3.66 in × 4.02 in) bore and stroke. It produces 175 hp (130 kW) at 5600 rpm and 185 lb⋅ft (251 N⋅m) of torque at 2800 rpm.[10] The engine redline is 6300 rpm.[11]

Applications:

• 2004–2006 Chevrolet Colorado
• 2004–2006 GMC Canyon
• 2004-2006 Isuzu i-280

The LLV (also called Vortec 2900) is a 2.9 L; 178.3 cu in (2,921 cc)[12] straight-4 DOHC engine produced between 2007 and 2012, with a 95.5 mm × 102 mm (3.76 in × 4.02 in) bore and a stroke. It replaced the LK5 and produced 185 hp (138 kW) at 5600 rpm and 190 lb⋅ft (258 N⋅m) of torque at 2800 rpm. Engine redline is 6300 rpm.[13]

Applications:

• 2007–2012 Chevrolet Colorado
• 2007–2012 GMC Canyon
• 2007–2009 Isuzu i-290