GMC OBD-II Trouble Codes

GMC anchor routes

• P0107 — Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
• P0015 — B Camshaft Position Timing Over-Retarded (Bank 1)
• P0018 — Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A)
• P0019 — Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor B)

How this hub fits the family

GMC sits in the gm truck and premium branches cluster as a expansion route. Use it when owner intent is brand-specific, then pivot back to the family lead for broader code coverage.

More badge-specific pivots

• Cadillac
• Buick

GM truck and premium branches

GMC, Cadillac, and Buick now extend GM routing beyond Chevrolet so reduced-power and timing-correlation searches do not collapse into one badge.

Why this hub matters: High-value support hubs around existing GM code depth.

GMC diagnostic routes

• Start with P0107 code coverage
• Check poor fuel economy symptom routing
• Open guide: How to Read Live Fuel Trim Data Without Guessing

Stay inside the family graph

• Cadillac
• Buick

GMC first-click codes

• P0107 — Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
• P0015 — B Camshaft Position Timing Over-Retarded (Bank 1)
• P0018 — Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A)
• P0019 — Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor B)
• P0025 — B Camshaft Position Timing Over-Retarded (Bank 2)
• P2126 — Throttle/Pedal Position Sensor/Switch E Circuit Range/Performance

Best symptom pivots

• Poor Fuel Economy
• Hard Start
• Reduced Power
• No Start But Cranks

Where to go next if this badge is not the whole story

• Chevrolet · 157 mapped codes — Primary GM volume route for ignition, EVAP, throttle, and transmission complaints
• Cadillac · 5 mapped codes — Luxury GM route for timing-correlation and throttle complaints
• Buick · 1 mapped codes — Support route for GM reduced-power searches under Buick intent

GMC trouble code pages

• P0107 — Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
• P0015 — B Camshaft Position Timing Over-Retarded (Bank 1)
• P0018 — Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A)
• P0019 — Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor B)
• P0025 — B Camshaft Position Timing Over-Retarded (Bank 2)
• P2126 — Throttle/Pedal Position Sensor/Switch E Circuit Range/Performance
• P0093 — Fuel System Leak Detected - Large Leak
• P0094 — Fuel System Leak Detected - Small Leak
• P2296 — Fuel Pressure Regulator 2 Control Circuit High
• P1516 — Throttle Actuator Control Module Throttle Actuator Position Performance

Frequent symptom paths

• Poor Fuel Economy
• Hard Start
• Reduced Power
• No Start But Cranks
• Reduced Engine Power Message