diff --git a/src/layouts/address-lookup/address-lookup.vue b/src/layouts/address-lookup/address-lookup.vue
index d0cca48d9..54020b7b0 100644
--- a/src/layouts/address-lookup/address-lookup.vue
+++ b/src/layouts/address-lookup/address-lookup.vue
@@ -520,8 +520,8 @@ export default {
         },
         showServiceZipField: {
             handler(newValue) {
-                // If the Service Zip Code field is ever hidden, clear out it's value
-                if (!newValue) {
+                // If the Service Zip Code field is ever hidden and not a heavy truck, clear out it's value
+                if (!newValue && !this.isHeavyTruck) {
                     this.serviceZipCode = null;
                 }
             },