History/Description Of The Used GMCÂ Sierra: The last-generation Sierra was available from 2007 to 2013 inclusive, and offered up a plethora of engines, drivelines, bodystyles and options packages. Competitors included the Dodge Ram, Ford F-150, Nissan Titan and Toyota Tundra.
Most models in the used market will pack a V8 engine, displacing either 4.8 or 5.3L. A larger 6.2L V8 with over 400 horsepower was available, as was a 4.3L V6.
Active cylinder management de-activated unneeded cylinders on the 5.3L engine, and a driveline update from 2011 and on helped improve fuel economy on all models.
Common Issues With A Used GMCÂ Sierra: Cycle through the various four-wheel drive modes, if equipped, ensuring the truck is able to switch between them as outlined in the owner’s manual.
Check the oil level and condition in any used model, noting that oil consumption was well documented in earlier models with the 5.3L engine. This may have been caused by the operation of the cylinder-deactivation system. If you’re worried, opt for another engine, or a 2010 or later model Sierra.
Further, pop the hood and listen to the engine idle. Zero your ears in to the top of the engine’s ‘heads’, noting any excessive clicking or clacking sounds that could indicate valve lifter issues. Insist on hearing the engine start up when it’s cold, when these sounds are likely to be most apparent.
A mechanic can help here if you’re not sure.
Check for any ‘Check Engine’ lights or warning messages, and be double sure the cruise control works properly. A faulty brake-light switch is the likely culprit if the cruise control is non-functional—though this is an easy part to replace.
An ‘in-the-air’ check of the Sierra’s underside by a mechanic is highly advised. In just a few minutes, said mechanic can easily assess the condition of the frame, brakes, suspension and other components. Leaks can be easily identified, too.
If you’re unsure of the history of the model in question, be sure to budget for a full tune-up and fluid change for added confidence.
Most models in the used market will pack a V8 engine, displacing either 4.8 or 5.3L. A larger 6.2L V8 with over 400 horsepower was available, as was a 4.3L V6.
Active cylinder management de-activated unneeded cylinders on the 5.3L engine, and a driveline update from 2011 and on helped improve fuel economy on all models.
 |
| Photo: Sébastien D'Amour |
Common Issues With A Used GMCÂ Sierra: Cycle through the various four-wheel drive modes, if equipped, ensuring the truck is able to switch between them as outlined in the owner’s manual.
Check the oil level and condition in any used model, noting that oil consumption was well documented in earlier models with the 5.3L engine. This may have been caused by the operation of the cylinder-deactivation system. If you’re worried, opt for another engine, or a 2010 or later model Sierra.
Further, pop the hood and listen to the engine idle. Zero your ears in to the top of the engine’s ‘heads’, noting any excessive clicking or clacking sounds that could indicate valve lifter issues. Insist on hearing the engine start up when it’s cold, when these sounds are likely to be most apparent.
A mechanic can help here if you’re not sure.
Check for any ‘Check Engine’ lights or warning messages, and be double sure the cruise control works properly. A faulty brake-light switch is the likely culprit if the cruise control is non-functional—though this is an easy part to replace.
 |
| Photo: Sébastien D'Amour |
An ‘in-the-air’ check of the Sierra’s underside by a mechanic is highly advised. In just a few minutes, said mechanic can easily assess the condition of the frame, brakes, suspension and other components. Leaks can be easily identified, too.
If you’re unsure of the history of the model in question, be sure to budget for a full tune-up and fluid change for added confidence.
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