While the Brembo brake upgrade for the Chevy Tahoe and Chevy Suburban can help to deliver a consistently-superb braking experience, the increase in the size of the rotors themselves is often a forgotten compromise when it comes to upgrading brakes. Unfortunately, one GM Authority reader discovered a potential lapse in foresight when he went to install a spare tire on his 2023 Chevy Suburban.
GM Authority reader Richard had the misfortune to learn that the full-size 17-inch spare wheel and P265/70R17 all-season spare tire (RPO code XCQ) isn’t compatible with the LPO, or dealer-installed, front six-piston Brembo brake upgrade package (RPO code 5FL) on his Suburban. Simply put, the 17-inch wheel doesn’t clear the bigger brake rotors and calipers on the front wheels.
The solution to this problem is straightforward in theory, but not so much in practice. If a 5JL-equipped Tahoe/Suburban blows a front tire, the spare must first be installed on a rear wheel, and that rear wheel must be installed up front. However, this procedure isn’t explained in the owner’s manual for the 5JL brake upgrade package, but it is for the heavy-duty front Brembo brakes (RPO code J49) included in the RST Performance Edition (RPO code WPK). Of course, these are two different options and corresponding RPO codes.
In a nutshell, replacing a blown front tire on a 5JL- or J49-equipped Chevy Tahoe / Suburban will require more elbow grease than a typical wheel swap would require, along with more time. On the other hand, owners could just call roadside assistance that’s provided for the duration of the vehicle’s powertrain warranty (in this case, 5 years or 60,000 miles, whichever comes first).