diff --git a/changes/33733-install-details-modal b/changes/33733-install-details-modal
new file mode 100644
index 0000000000..820ee99202
--- /dev/null
+++ b/changes/33733-install-details-modal
@@ -0,0 +1 @@
+* Fleet UI: Return pre-install query output in Install Details modal
\ No newline at end of file
diff --git a/frontend/components/ActivityDetails/InstallDetails/SoftwareInstallDetailsModal/SoftwareInstallDetailsModal.tests.tsx b/frontend/components/ActivityDetails/InstallDetails/SoftwareInstallDetailsModal/SoftwareInstallDetailsModal.tests.tsx
index 3daa56de3a..1f94462c64 100644
--- a/frontend/components/ActivityDetails/InstallDetails/SoftwareInstallDetailsModal/SoftwareInstallDetailsModal.tests.tsx
+++ b/frontend/components/ActivityDetails/InstallDetails/SoftwareInstallDetailsModal/SoftwareInstallDetailsModal.tests.tsx
@@ -7,6 +7,8 @@ import {
   getDefaultSoftwareInstallHandler,
   getSoftwareInstallHandlerNoOutputs,
   getSoftwareInstallHandlerOnlyInstallOutput,
+  getSoftwareInstallHandlerWithPreInstall,
+  getSoftwareInstallHandlerOnlyPreInstallOutput,
 } from "test/handlers/software-handlers";
 import mockServer from "test/mock-server";
 import { noop } from "lodash";
@@ -216,14 +218,78 @@ describe("SoftwareInstallDetailsModal", () => {
 
       expect(detailsButton).toBeInTheDocument();
       expect(
-        screen.queryByLabelText("Install script output:")
+        screen.queryByText("Pre-install query output:")
       ).not.toBeInTheDocument();
       expect(
-        screen.queryByLabelText(/Post-install script output:/i)
+        screen.queryByText("Install script output:")
+      ).not.toBeInTheDocument();
+      expect(
+        screen.queryByText(/Post-install script output:/i)
       ).not.toBeInTheDocument();
     });
 
-    it("shows install and post-install outputs after clicking Details", async () => {
+    it("shows pre-install, install, and post-install outputs after clicking Details", async () => {
+      mockServer.use(getSoftwareInstallHandlerWithPreInstall);
+      const renderWithServer = createCustomRenderer({ withBackendMock: true });
+      const { user } = renderWithServer(
+        <SoftwareInstallDetailsModal
+          details={baseDetails}
+          hostSoftware={baseHostSoftware}
+          onCancel={noop}
+        />
+      );
+
+      const detailsBtn = await screen.findByRole("button", {
+        name: /Details/i,
+      });
+      await user.click(detailsBtn);
+
+      // Pre-install output
+      expect(
+        await screen.getByText("Pre-install query output:")
+      ).toBeInTheDocument();
+      expect(screen.getByText("Pre-install check passed")).toBeInTheDocument();
+
+      // Install output
+      expect(screen.getByText("Install script output:")).toBeInTheDocument();
+      expect(screen.getByText("Install script ran")).toBeInTheDocument();
+
+      // Post-install output
+      expect(
+        screen.getByText("Post-install script output:")
+      ).toBeInTheDocument();
+      expect(screen.getByText("Post-install success")).toBeInTheDocument();
+    });
+
+    it("renders only pre-install output if that's the only script output present", async () => {
+      mockServer.use(getSoftwareInstallHandlerOnlyPreInstallOutput);
+      const renderWithServer = createCustomRenderer({ withBackendMock: true });
+      const { user } = renderWithServer(
+        <SoftwareInstallDetailsModal
+          details={baseDetails}
+          hostSoftware={baseHostSoftware}
+          onCancel={noop}
+        />
+      );
+
+      const detailsBtn = await screen.findByRole("button", {
+        name: /Details/i,
+      });
+      await user.click(detailsBtn);
+
+      expect(
+        await screen.getByText("Pre-install query output:")
+      ).toBeInTheDocument();
+      expect(screen.getByText(/pre-install only/i)).toBeInTheDocument();
+      expect(
+        screen.queryByText("Install script output:")
+      ).not.toBeInTheDocument();
+      expect(
+        screen.queryByText(/Post-install script output:/i)
+      ).not.toBeInTheDocument();
+    });
+
+    it("shows install and post-install outputs after clicking Details (no pre-install)", async () => {
       mockServer.use(getDefaultSoftwareInstallHandler);
       const renderWithServer = createCustomRenderer({ withBackendMock: true });
       const { user } = renderWithServer(
@@ -239,15 +305,48 @@ describe("SoftwareInstallDetailsModal", () => {
       });
       await user.click(detailsBtn);
 
-      await screen.findByText("Install script output:");
+      expect(
+        await screen.getByText("Install script output:")
+      ).toBeInTheDocument();
       expect(screen.getByText("Install script ran")).toBeInTheDocument();
       expect(
         screen.getByText(/Post-install script output:/i)
       ).toBeInTheDocument();
       expect(screen.getByText("Post-install success")).toBeInTheDocument();
+      expect(
+        screen.queryByText("Pre-install query output:")
+      ).not.toBeInTheDocument();
     });
 
-    it("does not render details button if details (script outputs) are empty", async () => {
+    it("shows only the install output if post-install and pre-install output is empty", async () => {
+      mockServer.use(getSoftwareInstallHandlerOnlyInstallOutput);
+      const renderWithServer = createCustomRenderer({ withBackendMock: true });
+      const { user } = renderWithServer(
+        <SoftwareInstallDetailsModal
+          details={baseDetails}
+          hostSoftware={baseHostSoftware}
+          onCancel={noop}
+        />
+      );
+
+      const detailsBtn = await screen.findByRole("button", {
+        name: /Details/i,
+      });
+      await user.click(detailsBtn);
+
+      expect(
+        await screen.getByText("Install script output:")
+      ).toBeInTheDocument();
+      expect(screen.getByText(/install only/i)).toBeInTheDocument();
+      expect(
+        screen.queryByText("Pre-install query output:")
+      ).not.toBeInTheDocument();
+      expect(
+        screen.queryByText(/Post-install script output:/i)
+      ).not.toBeInTheDocument();
+    });
+
+    it("does not render details button if all script outputs are empty", async () => {
       mockServer.use(getSoftwareInstallHandlerNoOutputs);
       const renderWithServer = createCustomRenderer({ withBackendMock: true });
       renderWithServer(
@@ -264,28 +363,5 @@ describe("SoftwareInstallDetailsModal", () => {
         })
       ).not.toBeInTheDocument();
     });
-
-    it("shows only the install output if post-install output is empty", async () => {
-      mockServer.use(getSoftwareInstallHandlerOnlyInstallOutput);
-      const renderWithServer = createCustomRenderer({ withBackendMock: true });
-      const { user } = renderWithServer(
-        <SoftwareInstallDetailsModal
-          details={baseDetails}
-          hostSoftware={baseHostSoftware}
-          onCancel={noop}
-        />
-      );
-
-      const detailsBtn = await screen.findByRole("button", {
-        name: /Details/i,
-      });
-      await user.click(detailsBtn);
-
-      await screen.findByText("Install script output:");
-      expect(screen.getByText(/install only/i)).toBeInTheDocument();
-      expect(
-        screen.queryByText(/Post-install script output:/i)
-      ).not.toBeInTheDocument();
-    });
   });
 });
diff --git a/frontend/components/ActivityDetails/InstallDetails/SoftwareInstallDetailsModal/SoftwareInstallDetailsModal.tsx b/frontend/components/ActivityDetails/InstallDetails/SoftwareInstallDetailsModal/SoftwareInstallDetailsModal.tsx
index b0f27cf46f..daec922174 100644
--- a/frontend/components/ActivityDetails/InstallDetails/SoftwareInstallDetailsModal/SoftwareInstallDetailsModal.tsx
+++ b/frontend/components/ActivityDetails/InstallDetails/SoftwareInstallDetailsModal/SoftwareInstallDetailsModal.tsx
@@ -260,6 +260,10 @@ export const SoftwareInstallDetailsModal = ({
 
   const renderInstallDetailsSection = () => {
     const outputs = [
+      {
+        label: "Pre-install query output:",
+        value: swInstallResult?.pre_install_query_output,
+      },
       {
         label: "Install script output:",
         value: swInstallResult?.output,
@@ -273,7 +277,8 @@ export const SoftwareInstallDetailsModal = ({
     // Only show details button if there's details to display
     const showDetailsButton =
       (!!swInstallResult?.post_install_script_output ||
-        !!swInstallResult?.output) &&
+        !!swInstallResult?.output ||
+        !!swInstallResult?.pre_install_query_output) &&
       swInstallResult?.status !== "pending_install";
 
     return (
diff --git a/frontend/test/handlers/software-handlers.ts b/frontend/test/handlers/software-handlers.ts
index d9e53f4bb1..b8ae9fd1ec 100644
--- a/frontend/test/handlers/software-handlers.ts
+++ b/frontend/test/handlers/software-handlers.ts
@@ -64,6 +64,44 @@ export const getSoftwareInstallResultHandler = http.get(
   }
 );
 
+// ---- Pre install query output ----
+
+// Installed, outputs for pre-install, install, and post-install
+export const getSoftwareInstallHandlerWithPreInstall = http.get(
+  baseUrl("/software/install/:install_uuid/results"),
+  ({ params }) => {
+    return HttpResponse.json({
+      results: {
+        ...createMockSoftwareInstallResult({
+          install_uuid: params.install_uuid as string,
+          status: "installed",
+          output: "Install script ran",
+          post_install_script_output: "Post-install success",
+          pre_install_query_output: "Pre-install check passed",
+        }),
+      },
+    });
+  }
+);
+
+// Failed install, only pre-install output
+export const getSoftwareInstallHandlerOnlyPreInstallOutput = http.get(
+  baseUrl("/software/install/:install_uuid/results"),
+  ({ params }) => {
+    return HttpResponse.json({
+      results: {
+        ...createMockSoftwareInstallResult({
+          install_uuid: params.install_uuid as string,
+          status: "failed_install",
+          output: "",
+          post_install_script_output: "",
+          pre_install_query_output: "Pre-install only",
+        }),
+      },
+    });
+  }
+);
+
 // ---- MDM Command Handlers ----
 
 /** This is used for testing command results of IPA custom packages */