If the problem was reported, a dealer may have made provisions to monitor oil consumption and rectify the issue. Some owners have had luck in getting dealers to correct the issue. Others haven’t. More information at this link, and note, again, that this oil consumption issue seems most likely in 2007 to 2009 GMT900 models with the 5.3L engine.

Ensure proper operation of the cruise control system, too. Numerous owners have reported issues with cruise control failure. Thankfully, the common fix is simply to replace the brake-light switch, which is a cheap and easily-replaced part. More information here.

Ensure the 4×4 system, if equipped, switches between its various modes as outlined in the owner’s manual. Don’t take the sellers word that the 4×4 system is working properly – check it for yourself. If the system doesn’t engage, or you note any ‘Service 4×4’ warnings, be sure to have a GM mechanic determine why. Typically, issues like these are caused by the computer that controls the system, not the pricey 4×4 actuator itself. Be double sure that’s the case if you note any issues. Note that the Escalade used an always-on four-wheel drive / AWD system, so switching modes will not be possible.

Open the front doors and feel the carpeting under the front floor mats for signs of moisture, which could be caused by a leaky windshield seal and / or plugged sunroof vent tubes. Check the rear seating floor area and the cargo hold for signs of moisture, too. Left unattended, trapped moisture can cause rust and mould, which is gross. Here’s some more reading.

Next, check the high-end feature content, if equipped. Now’s the time to make sure the Bluetooth, heated steering-wheel, chilled memory seats and power tailgate, if equipped, are working properly. None of these will be inexpensive to fix if they’re not working.

Note that many used GMT900 models will have modifications like air intakes and exhaust kits, which are typically considered safe, if they use high-quality parts and installation. However, the average shopper is advised to avoid models with extensive modifications to the engine, suspension or drivetrain. Further, note that lifted models, and models with extremely large tires and wheels, could cause issues.

On a pre-purchase inspection, be sure to have a mechanic inspect your potential used Suburban/Yukon/Escalade/Tahoe candidate for signs of excessive brake wear, tire wear, suspension component wear, and worn wheel-bearings, to ensure the seller isn’t trying to pass off a pricey repair bill.

The Verdict: A big and strong owners community has done a great job of documenting common issues with these sport utes in various owner forums, and most issues will be easily identified, familiar to a technician at a GM dealer, and relatively easy to remedy. An early model with the 4.8 or 6.2 litre engine, or any 2010 or newer model, will likely make the most confident purchase, provided they pass a mechanical pre-purchase inspection.

Here’s a partial list of recalls. Take the VIN number of the model you’re considering to a GM dealer to check for any outstanding recall work on the GMT900 model you’re considering.

Crash Test Scores:
Cadillac Escalade: 4/5 Stars (NHTSA)
Chevrolet Tahoe: 4/5 Stars (NHTSA)
GMC Yukon: 4/5 Stars (NHTSA)

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