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TROUBLESHOOTING DRIVELINE NOISES: Identifying Factory Solutions

TROUBLESHOOTING DRIVELINE NOISES: Identifying Factory Solutions

May 5, 2023

GM TRANSFER CASE NOISES Customer complaints involving howling, whining, shudder or grinding noises during parking lot maneuvers in Auto Mode or highway speeds in 4HI or Auto may occur on four wheel drive GM trucks and SUV vehicles. Vehicles affected range from 2014–2023 year models. Specific applications can be identified in GM Service Bulletin 19-NA-136. […]

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Normal vs. Severe Service Selecting the Proper Lube Service Interval

Normal vs. Severe Service Selecting the Proper Lube Service Interval

February 28, 2023

Scheduled vehicle maintenance makes good business sense, especially when compared to costly engine repairs or an engine replacement. Many vehicle owners unknowingly select a service interval that is not healthy for the engine or recommended by the vehicle manufacturer. Most vehicle manufacturers offer two service schedules…Normal and Severe Service. These options have created much controversy […]

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DIAGNOSING PERFORMANCE COMPLAINTS: The Process Can Be a Challenging Event

DIAGNOSING PERFORMANCE COMPLAINTS: The Process Can Be a Challenging Event

February 16, 2023

Troubleshooting today’s technology can be challenging for even the most experienced technician. Making an accurate diagnosis, rather than throwing a lot of expensive parts and labor at the symptom can be a challenge. How would your shop handle the following customer complaints? a) Crank but no-start b) Hard starts c) Long crank time d) Misfire […]

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New Technology Poses New Challenges: Today’s Technicians Must Be on Their Best Game

New Technology Poses New Challenges: Today’s Technicians Must Be on Their Best Game

February 3, 2023

When I started my career as a technician, performance-related diagnostics were not that challenging when compared to today’s technology. Most symptoms could be isolated to a fuel or ignition-related problem with a simple road test. Diagnostic equipment was limited to some basic tools such as a timing light, rpm/dwell meter, compression gauge, vacuum gauge, volt/ohm meter, […]

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Servicing Diesels Lack of Maintenance Promotes Costly Repairs

Servicing Diesels Lack of Maintenance Promotes Costly Repairs

December 30, 2022

Failure to provide timely maintenance on a turbo-charged diesel engine can result in some expensive repairs, especially if it involves replacing a turbocharger or engine. The inexperienced may not realize how important some of the basic services are when servicing these applications. The turbo-diesel engines require a greater volume of air compared to a normal […]

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Maintenance Intervals: Lack of Service Can Lead to a Catastrophic Event

Maintenance Intervals: Lack of Service Can Lead to a Catastrophic Event

October 20, 2022

Neglecting maintenance intervals can result in performance issues and internal engine damage due to sludge deposits restricting the flow of lubricant to vital engine components. Evidence of lack of maintenance will normally show up in the oil filter and related housing. The filter media will be impacted with sludge deposits. Where applicable, the filter cap […]

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SERVICING DIESELS: Identifying Normal Characteristics

SERVICING DIESELS: Identifying Normal Characteristics

September 20, 2022

A major part of the diagnostic process is identifying an issue from a normal characteristic. Following are some examples of customer complaints that could be mistaken as a problem when they may be a normal occurrence for the application. DIESEL ENGINES AND NOISE-RELATED SYMPTOMS Customer complaints of ticking, clicking, or cycling noises on 2017–2022 GM […]

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A Difficult Diagnosis: When Multiple Conditions Create Similar Symptoms

A Difficult Diagnosis: When Multiple Conditions Create Similar Symptoms

July 21, 2022

Customer complaints of rough idle, misfires, crank but no start or long crank time symptoms can be a challenge with today’s technology. Random or multiple misfire codes may be stored in memory. Symptoms that seem like an ignition related issue may actually be fuel related, carbon induced, or in some cases a normal characteristic. Fuel […]

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ELECTRICAL CONNECTIONS OR LOW VOLTAGE: Both Can Create Intermittent Electrical Challenges

ELECTRICAL CONNECTIONS OR LOW VOLTAGE: Both Can Create Intermittent Electrical Challenges

June 27, 2022

Low voltage conditions or the integrity of an electrical connection can pose some challenging events for the technician attempting to make an accurate diagnosis. In the world of automotive diagnostics, electrical problems have proven to be the most challenging, especially intermittent problems. Intermittent performance problems can be affected by connection-relate conditions and the presence of […]

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FLUID LEVELS AND SERVICE INTERVALS: LOW FLUID LEVEL CAUSES POWER TRANSFER UNIT FAILURE

FLUID LEVELS AND SERVICE INTERVALS: LOW FLUID LEVEL CAUSES POWER TRANSFER UNIT FAILURE

May 20, 2022

LOW FLUID LEVEL CAUSES POWER TRANSFER UNIT FAILURE Are you accurately checking those fluid levels and recommending fluid flushes or exchanges, where applicable? Unfortunately, many service technicians fall into a pattern of just performing lubrication services requested by the customer, which is usually triggered by a service reminder light indicating that it is time for […]

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