Contact Us

LSwiring.com was created to be an online experience only. This means we do not offer phone support. We understand this may not be acceptable to some, but we strive to maintain an excellent reputation of support through email. We request your phone number so that we may contact you in the event that we are unable to reach you by email.

• We do not offer PCM, ECM, and TCM tuning support.
• We do not offer wiring diagrams.
• We do not offer used wire harness rework.
• We do not offer custom engine wire harness builds.
• We do not offer for sale ANYTHING not seen in this store.

Our partner, EFI Connection LLC, has been offering custom LS harness solutions for more than 15 years. Send your custom inquiries to help@eficonnection.com.

Please complete the form below. Our LSwiring.com support staff will get back with you as soon as possible.