Need Assistance? (Se Habla Espanol) Call or Chat Online

Select by Brand

Get Email Exclusives

Sign up for email updates on the latest exclusive offers

Hummer H1 Starter

How to Diagnose Wear and Other Problems with the Hummer H1 Starter

The starter in the Hummer H1 is not commonly known to cause problems, but when it does it can reduce the H1's powerful V8 diesel engine into nothing more than a huge metal paperweight. Starter motors usually last anywhere from 100,000 to 150,000 miles of use depending on how often it is maintained and the quality of the starter itself, but once it does start to show signs of wear repair or replacement must be done immediately. Some of the common tell-tale signs of Hummer H1 starter failure include:

The glow plugs warm up but nothing happens when the switch is turned on

If you hear the glow plugs warm up but nothing happens when you turn on the switch, one of its causes could be a faulty starter solenoid. To confirm if the starter is the source of the problem, check for a clunking noise from the starter. If there is, the solenoid contacts in the starter have gone bad and needs to be repaired. However, if there is no noise coming out of the starter, the problem is more likely to be in the neutral safety switch or one of its wires or a blown fuse.

The starter clicks but doesn't the engine stays cold

If this problem occurs, it could mean that the starter has gone bad and is running down the batteries. Check if the lights flicker when the starter clicks. If it does, the starter has drained the batteries dry or there's a bad battery connection. But if the lights remain steady, the batteries and the battery cables are probably fine and the culprit is a malfunctioning starter. On the other hand, if this problem occurs after installing a new starter, the starter may have been installed with the wrong shims and just needs readjusting.

The starter isn't engaging properly

If you notice that the starter in your H1 does not properly engage, the starter shims may need to be added or removed from the mounting block and engine. If the starter is engaging roughly, the shims may have to be installed at the mounting point. But if the engagement is weak, the starter may not be catching enough teeth on the flexplate and the shims must be removed.

  • Tips on How to Maintain the Hummer H1 Starter

    The Hummer H1 starter is responsible for starting the combustion process in the engine, so it's essential that it is always in top condition to ensure that a smooth start and operation of the engine. The Hummer H1 starter can operate as long as 150,000 miles before showing signs of wear, but this can only be achieved with regular inspection and maintenance. Caring for and maintaining the starter in working condition is not that difficult, provided that you give enough time and discipline for it. With that said, here are some simple but effective tips on maintaining your Hummer H1's starter:


    Start the Hummer with all of the components switched off.


    While it may seem convenient to leave the A/C and the high-powered stereo in your H1 on after you turn off the ignition, starting your vehicle with all of these components turned on would greatly increase the load on the starter. So make sure that all of the appliances in your Hummer are turned off before turning the key in your ignition.


    Replace the entire starter assembly even if only one part of the starter broken.


    While it is possible for different parts of the starter, such as the starter drive pinion for example, to be replaced separately from the starter assembly, it is recommended to replace the entire assembly once one of its components wears out or is damaged. All of the starter components are exposed to the same wear caused by age, use and high operating temperatures, so once one of the parts succumbs to wear the rest will eventually fail as well. What's more, replacing the entire starter assembly will avoid any incompatibility issues as compared to using a new starter component with older parts in the assembly.


    Make sure that the starter shims are in their proper positions especially when installing a new starter.


    Improperly placed starter shims are a common problem after replacing the component and could lead to the starter not being able to engage or disengage properly. So make sure that all the shims are in their proper positions between the mounting block and the engine before securing the starter in place.