dermo,
Under normal circumstances the following should be covered under the Emissions and Powertrain Warranties. Your Powertrain Warranty would cover hot spots depending on what the root cause is related to. You can check with your dealership's Warranty Manager for further details. Hope this information is helpful.
Federal Emissions Warranty:
• Air injection reactor (AIR) pump, Air distributor and valves.
• Pulse AIR valve and associated parts.
• Positive crankcase ventilation (PCV) valve and associated parts.
• Exhaust gas recirculation (EGR) valve and associated controls.
• Power control and EFI systems. *
• Intake/exhaust manifolds turbocharger and supercharger.
• Catalytic converter system.
• Sealing devices and mounting hardware.
• Exhaust system up to the catalytic converter.
• Distributor parts and associated controls.
• Spark plugs and ignition wires. *
• Fuel tank filler cap restrictor and vapor control valves.
• Evaporative emission control carbon canister and associated controls.
• Emission related hoses, clamps, belts, pulleys, tubes, fittings and wiring harness used on the above components
• Mass Air Flow Sensor
Powertrain Warranty:
• Gasoline engines - Cylinder Block and heads, and all internal parts, intake manifold, timing gears, timing gear chain or belt and cover, flywheel, harmonic balancer, valve covers, oil pan, oil pump, engine mounts, seals, and gaskets, water pump; also turbocharger and supercharger housings and internal parts, valves, seats, and gaskets.
• Transmission - Case and all internal parts, torque converter, vacuum modulator, seals and gaskets and transmission mounts, also transfer case and all internal parts, seals and gaskets.
• Front Wheel Drive - Final drive housing and all internal parts, axle shafts, constant velocity joints, front hub bearings, seals and
gaskets.
• Rear Wheel Drive - Axle housing and all internal parts, axle shafts, bearings, supports, seals and gaskets propeller shafts. U-joints.
Please feel free to private message me or post if you have any additional warranty questions or concerns.
Vanessa
GM Customer Service