GMC Archives - The Diesel Doctor

2019 GMC Sierra 3500 HD
Mileage
98,100
Service Date
5/8/2026
Services Performed
FOUND: ENGINE CODES P0205 "CYLINDER 5 INJECTOR CONTROL CIRCUIT – MALFUNCTION" AND P0676 "CYLINDER 6 GLOW PLUG CONTROL CIRCUIT – MALFUNCTION" (RECOMMEND REPLACING; CYLINDER #5 FUEL INJECTOR CONNECTOR, CYLINDER #6 GLOW PLUG, AND CONTINUE DIAGNOSTICS IF NEEDED). 5-1-26 M.U. 9AM
DURING REPAIRS: FOUND CYLINDER #5 FUEL INJECTOR CONNECTOR NOT SEATED ALL THE WAY INTO INJECTOR (WE RECONNECTED, PERFORMED TEST DRIVE, AND NO CODES RETURNED AT THIS TIME), LOW FUEL MESSAGE ON DASH (RECOMMEND TALKING TO CUSTOMER ABOUT OPTIONS), WATER IN FUEL LIGHT ON (RECOMMEND TALKING TO CUSTOMER ABOUT OPTIONS), BRAKE SQUEAL ON TEST DRIVE (ALL BRAKES LOOK GOOD), AND FRONT PASSENGER SIDE CV AXLE IS NOT PRESENT (RECOMMEND REPLACEMENT). 5-7-26 C.E. 12PM
AFTER REPAIRS: NO GLOW PLUG CODES HAVE RETURNED AT THIS TIME. 5-8-26 C.E. 8AM
KYLE C. gave our service a 5 star review on 5/10/2026
2011 GMC Sierra
Mileage
190,978
Service Date
5/1/2026
Services Performed
FOUND: MULTIPLE ENGINE CODES (SEE LIST)(RECOMMEND CLEARING, RESCANNING, AND CONTINUE DIAGNOSTICS IF ANY CODES RETURN). CONTINUED: FOUND: ENGINE CODE P2033 "EXHAUST GAS TEMPERATURE (EGT) SENSOR 2 CIRCUIT HIGH VOLTAGE" RETURNED (RECOMMEND REPLACING EGT POSITION #2 (PER TEST RESULTS), AND CONTINUE DIAGNOSTICS IF NEEDED). 4-27-26 C.E. 4PM DURING SERVICE FOUND: FRONT LEFT UPPER BALL JOINT BAD (RECOMMEND REPLACEMENT), HOLE IN COOLANT RESERVOIR (RECOMMEND REPLACEMENT), CHANGE FUEL FILTER MESSAGE ON DASH (RECOMMEND TALKING TO CUSTOMER ABOUT OPTIONS), AND DIESEL EXHAUST FLUID (DEF) LIGHT ON. 4-27-26 C.E. M.U. 4PM
FOUND: FRONT DRIVER SIDE AXLE ASSEMBLY BROKE (RECOMMEND REPLACEMENT). 4-29-26 K.D. C.E.
EXHAUST GAS TEMPERATURE (EGT) SENSOR – REMOVE AND REPLACE (POSITION #2)
BALL JOINT – REMOVE AND REPLACE (DRIVER SIDE UPPER)
AXLE SHAFT ASSEMBLY – REMOVE AND REPLACE (FRONT DRIVER SIDE)
RICK G. gave our service a 5 star review on 5/1/2026
2023 GMC Sierra 3500 HD
Mileage
29,282
Service Date
4/27/2026
Services Performed
DURING REPAIRS: FOUND SIGNS OF OIL LEAK COMING DOWN NEAR OIL FILTER HOUSING (POSSIBLE ENGINE OIL COOLER)(RECOMMEND RESCHEDULING IF PROBLEM WORSENS), AND FRONT COVER AROUND CRANKSHAFT PULLEY DAMP WITH OIL (POSSIBLE FRONT CRANK SEAL)(RECOMMEND RESCHEDULING IF PROBLEM WORSENS). 4-27-26 C.E. L.U.
TRANSMISSION OIL PAN – REMOVE AND REPLACE (CUSTOMER SUPPLIED)
DIFFERENTIAL COVER – REMOVE AND REPLACE (REAR)(CUSTOMER SUPPLIED)
BRIAN B. gave our service a 5 star review on 4/27/2026
2016 GMC Sierra 3500 HD
Mileage
256,254
Service Date
8/1/2025
Services Performed
FULL SCAN AND PRINT – LU
FOUND: READINGS FOR REDUCTANT FLUID HEATERS OUTSIDE OF SPECIFICATIONS (RECOMMEND REPLACING REDUCTANT HEATER, SUPPLY LINE ASSEMBLY, AND CONTINUE DIAGNOSTICS IF NEEDED). AFTER REPAIRS: AFTER MULTIPLE TEST DRIVES AND MILES NO AFTERTREATMENT ISSUES AND SYSTEM WORKING PROPERLY AT THIS TIME. 6-13-25 LU
FOUND: TRAILER BRAKE OPERATING PROPERLY AT THIS TIME (RECOMMEND RESCHEDULING IF PROBLEM PERSISTS). 5-19-25 M.E. 3PM
REDUCTANT FLUID HEATER AND SUPPLY LINE ASSEMBLY – REMOVE AND REPLACE
TERRY F. gave our service a 5 star review on 8/5/2025
2007 GMC Sierra Classic
Mileage
159,653
Service Date
7/18/2025
Services Performed
FOUND: PASSENGER REAR AXLE SEAL LEAKING, WHILE REMOVING PARTS TO GET TO SEAL FOUND BRAKE CALIPER BOLT LOOSE AND WHEEL HUB NOT SEATED PROPERLY, SOME SCORING ON SPINDLE SHAFT (WHERE SEAL MAKES CONTACT), AND BRAKES SATURATED IN GEAR OIL (RECOMMEND CLEANING UP SPINDLE SHAFT, CLEANING BRAKE COMPONENTS, REPLACING SEAL, AND CUSTOMER DRIVE TIME TO CONFIRM NO OTHER ISSUES PRESENT). 7-17-25 M.U. 10AM
WHEEL SEAL – REMOVE AND REPLACE (REAR PASSENGER SIDE)
ROB B. gave our service a 5 star review on 7/19/2025
2013 GMC Sierra 2500 HD
Mileage
181,431
Service Date
2/17/2025
Services Performed
DROVE MULTIPLE TIMES AND HAVE NO CONCERNS AT THIS TIME, C.E. M.U. 2/13/25 10AM
WILLIAM C. gave our service a 5 star review on 2/18/2025
2013 GMC Sierra 2500 HD
Mileage
178,801
Service Date
10/29/2024
Services Performed
DURING REPAIRS: FOUND WHEEL SEAL BLOWN (WE REPLACED BOTH) C.E. 10/29/24 10AM
WILLIAM C. gave our service a 5 star review on 10/30/2024
2006 GMC Sierra
Mileage
265,062
Service Date
7/15/2024
Services Performed
FOUND: RECOVERED, EVACUATED, RECHARGED A/C SYSTEM, 1.6LBS OF FREON, SYSTEM HOLDS CHARGE AND IS BLOWING COLD AIR AT THIS TIME. M.U. 7/15/24 10AM
ROBIN B. gave our service a 5 star review on 7/15/2024
2015 GMC Sierra 2500 HD
Mileage
256,726
Service Date
7/1/2024
Services Performed
FOUND: AIR FILTER LITTLE DIRTY, (RECOMMEND AIR FILTER ON NEXT SERVICE, OR S&B FILTER SYSTEM) L.U. 7/1/24 12PM
FUEL FILTER – REMOVE AND REPLACE
CHERYL A. gave our service a 5 star review on 7/1/2024
2005 GMC Sierra
Mileage
170,065
Service Date
6/10/2024
Services Performed
FOUND: POWER STEERING LINES ARE LEAKING (RECOMMEND REPLACING ALL THREE PRESSURE LINES) SERVICE DUE (RECOMMEND OIL SERVICE), CODE P0101B, P0102B MASS AIR FLOW SENSOR PERFORMANCE, AND CIRCUIT LOW VOLTAGE, ( RECOMMEND CLEANING AND RETESTING IF FAULT COMES BACK REPLACE), PO207A, P2146A INJECTOR #7 CONTROL CIRCUIT, POSITIVE VOLTAGE CONTROL CIRCUIT GROUP1, (RECOMMEND INJECTOR #7 CONNECTOR, OR POSSIBLE INJECTOR HARNESS) M.U. 6/5/24 10AM AFTER REPAIRS NO ISSUES AND NO CODES AT THIS TIME. M.E. 6/7/24 4PM
POWER STEERING HOSE – REMOVE AND REPLACE (ALL)
MASS AIR FLOW SENSOR – REMOVE, CLEAN, REINSTALL
INJECTOR WIRE CONNECTOR – REMOVE AND REPLACE (#7)
ENGINE OIL – DRAIN, FILL, REMOVE AND REPLACE FILTER
TOD G. gave our service a 5 star review on 6/11/2024

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