Additional Symptoms Tests: Surges/Chuggles

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the mass air flow (MAF) sensor for obstruction, contamination and damage - Refer to DTC P0101 and DTC P0102 or P0103 for more information.
Fuel injectors incorrectly connected. Verify each injector is connected to the correct fuel injector harness connector.
Inspect for slow responding heated oxygen sensors (HO2S). The HO2S should respond quickly to a change in throttle position. If the HO2S do not respond to different throttle positions, inspect for contamination from fuel, silicon, or the incorrect use of RTV sealant. The sensors may have a white powdery coating and result in a high, but false, signal voltage, which gives a rich exhaust indication. The ECM reduces the amount of fuel delivered to the engine, causing a driveability condition - Refer to DTC P0133, P013A-P013F, P014A, P014B, P0153, P015A-P015D, P1133, P1153 or P2270-P2273 for more information.