🔧 Wire up your LS swap like a pro — flawless fit, fierce performance!
This standalone wiring harness is engineered for 1997-2006 GM LS1 Vortec engines with drive-by-cable throttle bodies and 4L60E/4L80E transmissions. Featuring OEM-accurate design, premium copper core wires, and high-temp resistant insulation, it delivers reliable, plug-and-play connectivity for fuel injection and sensor systems. Complete with detailed instructions and a 10-year warranty, it’s the ultimate upgrade for professional-grade LS swaps.
| Manufacturer | Gledewen |
| Brand | Gledewen |
| Item Weight | 6.53 pounds |
| Package Dimensions | 14.09 x 11.69 x 5.51 inches |
| Manufacturer Part Number | GW-QXS03 |
T**S
5.3 wiring harness
Great wiring harness with good price!
R**R
Easy install fast shipping
Great kit got my s10 5.3l swap on the road
N**G
Decent quality, don't have it installed but DID check the pin out
I found that for a Vortec 5.3 PCM from a truck, pins 54 and 60 on the blue plug were swapped, and pin 52 on the red plug was empty when it should have had the brown wire from pin 75 which is not supposed to be used, according to the 99-01 Silverado pin out on LT1swap dot com. If you're having issues look there.
J**L
Wires missing and not wired correctly
Harness not wired correctly. Found missing OBD 2 can bus wires missing. Pin 58 is wired and going somewhere it doesn't belong. Waiting for my replacement to come in. Will report again about quality of harness when second one comes in. This time I will be home testing every pin to verify that the wires are in their correct locations and going where they are supposed to go. Poor engine harness. Poor quality control and so far no customer service. When the next harness comes in and it is incorrect I will be asking for a refund. I got over 10 hours and chasing down wires on this harness. I'm not very happy.
P**O
Pretty nice for the price
Not bad for the price wires definitely on cheaper side and would be nice if stuff was labeled but otherwise nice
D**A
Test ASAP
Make sure you test this product as soon as you receive it. The wires are backwards
R**D
Noce
Nice
D**N
Wiring harness exactly as expected,excellent delivery.
Excellent product used for engine trans plant.
Trustpilot
2 months ago
1 month ago
