Important Bulletins and PIs for Engine Technicians

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1 Important Bulletins and PIs for Engine Technicians This listing is based on information available as of June 15, Follow strategy-based diagnostics and check the Service Information for the latest bulletins and PIs. 4 CYL 1.4 LUV/LUJ 1.6 LXV 1.8 LUW/2H Chevrolet Cruze PIP5036D Possible oil consumption or blue smoke from the exhaust CEL or fuel trim codes Chevrolet Cruze 2012 Sonic PI0851A Turbocharger oil feed and return line inspection when servicing turbocharger assembly Chevrolet Cruze PI0850 Whistle noise heard from engine compartment, rough idle and/or DTC P0171 set Chevrolet Aveo PIP4977A Diagnostic Tip - Information regarding oil flow and the oil restrictor Chevrolet Cruze orifice in the engine block deck Chevrolet Sonic Pontiac Wave/G Saturn Astra Chevrolet Aveo PI0725 Normal engine cylinder bore marks Chevrolet Cruze 2012 Chevrolet Sonic Pontiac G3, Wave Chevrolet Aveo Chevrolet Cruze Chevrolet Sonic PI0867 Intermittent engine no crank, intermittent exhaust Camshaft Position (CMP) sensor signal 1.8 LAY 2009 Pontiac Vibe AIP3423 MIL on after CMP actuator gear replacement 2.0L LTG PI0768C Engine exchange 2013 Chevrolet Malibu Buick LaCrosse, Regal PI0562F Cold start rattle noise 2.4 LAF/LUK/LEA Chevrolet Equinox GMC Terrain Buick Lacrosse PIP5025A Oil consumption 2.4 LAF 2011 Buick Regal GMC Terrain 2010 Buick LaCrosse PIP LAF 2010 Chevrolet Equinox 2010 GMC Terrain 2.5L LCV PI0768C Engine exchange 2013 Chevrolet Malibu 2.5 LKW 2014 Chevrolet Impala PIP5106 Engine exchange MIL on with P0171 P0089 and/or P228d and high fuel pressure after engine replacement 1

2 6 CYL All HFV6 3.0 LF1/LFW 3.6 LFX/LLT LY7, LLT Cadillac CTS Cadillac SRX Cadillac STS 2013 Cadillac XTS GMC Acadia GMC Terrain Pontiac G Saturn Outlook Saturn Aura Buick Lacrosse, Allure (Canada only) Buick Enclave Saturn Vue Chevrolet Camaro Chevrolet Impala Chevrolet Malibu Chevrolet Equinox Chevrolet Traverse Pontiac Torrent Buick Enclave Buick LaCrosse Cadillac CTS 2011 Cadillac STS Cadillac SRX 2013 Cadillac XTS Chevrolet Camaro Chevrolet Caprice PPV Chevrolet Captiva Sport Chevrolet Equinox Chevrolet Impala Chevrolet Traverse GMC Terrain Buick Enclave Chevrolet Malibu Chevrolet Traverse GMC Acadia Saturn OUTLOOK PIP4384G PIP4959C PI0746C Supplement to SI timing procedure for high feature V-6 engine Cold start misfires Poor acceleration, throttle body freezing, multiple DTCs set, ice deposits and/or oil deposits present in air inlet duct 2

3 6 CYL ALL HVV6 3.5 / LVIN H RPO LV Buick Lucerne 2006 Buick Rendezvous Buick Terraza Chevrolet Impala Chevrolet Malibu Chevrolet Monte Carlo Chevrolet Uplander Pontiac G Pontiac Montana SV Saturn Aura Saturn Relay 2007 Saturn Vue PIP5064C 2014 Chevrolet Silverado, GMC Sierra PIP5114 Engine exchange 3 Rough running - idle surge - CEL on or CMP actuator codes after installation of reman HVV6 4.6 LHU Cadillac SRX, STS, XLR PIP4577M SES light with DTCs P0171 and P Possible air leaks L52/LL8/LLR/LK5/LLV Chevrolet TrailBlazer Chevrolet Colorado GMC Envoy GMC Canyon Hummer H Buick Rainier Chevrolet Colorado Chevrolet TrailBlazer GMC Canyon GMC Envoy PIP3694E PIP4913 Belt noise rough idle and/or SES light with DTC P0014 and/or P Inspect CMP actuator solenoid and crankshaft end play SES light intermittent DTC P0017 after cylinder head replacement engine oil debris contamination 5.3LVIN C RPO L Chevrolet Silverado, GMC Sierra PIP5114 Engine exchange Buick LaCrosse, Allure (Canada Only) 2007 Buick Rainier Cadillac Escalade Chevrolet Camaro SS Chevrolet Avalanche, Silverado, PIP4568L Tick noise and/or misfires on AFM cylinders and/or 7 Suburban, Tahoe L76, L77, L94, L99, Chevrolet Trailblazer LC9, LFA, LH6, LMG, Chevrolet Impala SS LS 4, LY5, LZ Chevrolet Monte Carlo SS GMC Envoy GMC Sierra, Yukon Pontiac G Pontiac Grand Prix GXP Saab 97x

4 8 CYL L94, L99, LZ1, LC9, LH6, L76, L92, LFA, LMG, LY5 V8 engine 6.0 LC Cadillac Escalade Models Chevrolet Avalanche, Silverado 1500, Suburban, Tahoe Chevrolet Camaro GMC Sierra 1500, Sierra Denali, Yukon Models Pontiac G8 GT Buick Rainier Buick LaCrosse, Allure (Canada Only) Cadillac CTS-V Cadillac Escalade Chevrolet Camaro Chevrolet Caprice Chevrolet Avalanche Chevrolet Express, Silverado, Suburban, Tahoe Chevrolet Colorado Chevrolet Trailblazer Chevrolet Impala SS Chevrolet Monte Carlo SS Chevrolet SSR Chevrolet Corvette GMC Canyon GMC Envoy GMC Savana, Sierra, Yukon Hummer H Hummer H Pontiac G Pontiac GTO Pontiac Grand Prix GXP Saab 97x 2012 Chevrolet Express 2012 GMC Savana I Oil consumption AFM engines PIP4138M SES light, misfire, DTC P0300, and/or a chirp, squeak, squeal, or tick noise PI and Prior GM Passenger Cars and Trucks I 2011 Chevrolet Express 2500, 3500 Cargo Vans PI0528A 2011 GMC Savana 2500, 3500 Cargo Vans Fuel gauge inoperative, P0463 DTC set, Malfunction Indicator Lamp (MIL) light on, fuel gauge drops to empty after 1/2 tank Comeback prevention information and using Customer Concern Verification Sheets (CCVS) Intermittent engine flutter during hard braking maneuver, engine hard to start 4

5 8 CYL LFA, LY2, L20, LMG LC9, LH6, LMF, LH8 LH9, L76, LS2, LY5, LY6, L92, L96 LZ1, L94, L9H DIESEL Cadillac Escalade Models Cadillac Escalade Two-Mode Hybrid Chevrolet TrailBlazer Chevrolet Avalanche, Colorado, Express, Silverado, Suburban, Tahoe Chevrolet Tahoe Two-Mode Hybrid Chevrolet Silverado Two-Mode Hybrid GMC Envoy GMC Canyon, Savana, Sierra, Sierra Denali, Yukon Models GMC Yukon Two-Mode Hybrid GMC Sierra Two-Mode Hybrid HUMMER H HUMMER H c Malfunction Indicator Lamp (MIL) illuminated, reduced engine power message displayed, DTC P2135 set 2.0 (LUZ) 2014 Chevrolet Cruze PIP5116 Engine exchange Chevrolet Silverado 2500HD, 3500 PIP3129B Smoke, fuel knock, surging and high injector balance rates GMC Sierra 2500 HD, Chevrolet Kodiak GMC TopKick Chevrolet Silverado Service Engine Soon (SES) light on with reduction in engine power, 6.6 LLY Chevrolet Kodiak C4500/C5500 Series 047B DTCs P0202 and P2149 or P0207 and P2146 or P1294 set (Install GMC Sierra revised 90 degree injector connector w/harness support bracket kit) GMC Topkick C4500/C5500 Series Chevrolet Express, Kodiak, Silverado, Silverado Classic GMC Savana, Sierra, Sierra Classic, PIP4629A Diesel engine turbo DTC P2563 or P003A 6.6L ( LGH, LML) Topkick Chevrolet Express GMC Savana Chevrolet Silverado GMC Sierra Equipped with the 6.6 Duramax Diesel Engine (RPO codes LML and LGH) PIP L Duramax diesel engine (RPO LGH and LML) part number

6 DIESEL Chevrolet Kodiak, Silverado GMC Sierra, Topkick PIP4516D Light and medium duty trucks EGR DTC P LMM Chevrolet Express, Kodiak C4500/C5500 Series, Silverado, Silverado Classic Chevrolet Silverado Classic GMC Sierra Classic Chevrolet Silverado GMC Sierra C PIP4526 LBZ, LLY, LMM MIL/SES Light On, DTC P0087-Fuel Rail Pressure (FRP) too low, lack of performance, no power, engine runs rough, no start (diagnose fuel system components) Diesel engine fuel line repairs 6.6 LML Chevrolet Silverado and GMC Sierra PIP5007A Exhaust fluid quality poor message difficult to clear Chevrolet Express, Silverado PIP4829B Service exhaust fluid message will not clear GMC Savana, Sierra PIP4949C Duramax diesel hard start no start or DTC P0087 injection pump replacement ALL ENGINES All engines 2013 and Prior GM Passenger Cars and Trucks D Use of surface conditioning disks when cleaning engine gasket sealing surfaces and/or reused engine parts 6