Dan Maslic, Author at UnderhoodService
Avoiding Those Hi-Tech Returns

One of the more common complaints these days from jobbers and retailers when dealing with electronic powertrain control modules (ECMs/PCMs) is the relatively high number of defective returns, exchanges or warranty claims demanded by repair shops. Yet, of all electronic parts that come back defective, ECMs tend to be the ones most often misdiagnosed. This

Diagnosing GM LT1 V8 Engines

The Chevrolet LT1 engine is the second-generation (Gen II) design of Chevy’s famous small block. The LT1 was fitted in Chevy’s Corvette, Camaro and Caprice/Impala SS. This engine also was used by Pontiac for the Firebird, by Buick for the Roadmaster and by Cadillac for the Fleetwood. The LT1 was first available on the Corvette

No-Start and Rough-Running: 1996 Chrysler Sebring Coupe

Anyone who has been around the block a few times in the service and repair industry is bound to get called at some point by a customer (or another shop) that has a problematic vehicle that nobody can figure out. Usually at this point some ridiculous amount of money and time has been spent on

Servicing Solutions: Working on Customers’ Work Vehicles

One of the finer lines to walk in the service and repair industry is how deep in the mud you’re willing to get when a customer brings in a vehicle with an intermittent driveability problem. An intermittent surge with a vehicle that is driven once a week is one thing. An intermittent stall on a

Niche of Time: GM VTD Systems & Relearn Procedures

As we all know, in the world of automotive technology, things keep changing. In the aftermarket, we tend to feel these changes a little later than the OE dealers. That being the case, it’s no surprise that it has been only recently that many technicians are feeling the sting and frustrations caused by OE anti-theft

The Origins to a Breakdown

It’s interesting to see the look on a technician’s face as a vehicle gets towed into a shop on the back of a truck. That’s the opening scene for a no-start problem. You can usually tell when a technician thinks it’s good, and you can definitely tell when he thinks it’s bad. Not many techs

Flash! Reprogramming Vehicle Computers

Typically, when someone brings up the subject of “flashing” you get two reactions. The technologically informed service professionals think about added revenue and service, while rowdier folks think about doing something that could land them in front of a judge. I think we can all agree that the first group is far better off, and