# 1991 GMC Sierra 1500 surges after replacing ignition control module

**URL:** <https://community.cartalk.com/t/1991-gmc-sierra-1500-surges-after-replacing-ignition-control-module/168729>\
**Category:** Maintenance/Repairs\
**Tags:** sierra1500, gmc\
**Created:** [August 15, 2020, 7:02pm UTC](https://community.cartalk.com/t/1991-gmc-sierra-1500-surges-after-replacing-ignition-control-module/168729 "2020-08-15T19:02:41Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![edgarmarsaw](https://avatars.discourse-cdn.com/v4/letter/e/e495f1/32.png) [@edgarmarsaw](https://community.cartalk.com/u/edgarmarsaw)\
**Post date:** [August 15, 2020, 7:02pm UTC](https://community.cartalk.com/t/1991-gmc-sierra-1500-surges-after-replacing-ignition-control-module/168729/1 "2020-08-15T19:02:41Z")

</div>

pick up a surging problem after replacing ignition control module

---

<div class="post-metadata">

**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [August 17, 2020, 12:18pm UTC](https://community.cartalk.com/t/1991-gmc-sierra-1500-surges-after-replacing-ignition-control-module/168729/2 "2020-08-17T12:18:00Z")

</div>

We need a lot more info about the truck… What engine, how many miles, what transmission?

When does this occur? Hot or cold engine? How or cold day? All the time or only on the highway? Only in traffic?

---

<div class="post-metadata">

**Author:** ![Cavell](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cavell/32/43396_2.png) [@Cavell](https://community.cartalk.com/u/Cavell)\
**Post date:** [August 17, 2020, 1:29pm UTC](https://community.cartalk.com/t/1991-gmc-sierra-1500-surges-after-replacing-ignition-control-module/168729/3 "2020-08-17T13:29:58Z")

</div>

Did it surge before? Maybe ign module was not the problem?